Areas of Circles are for \(490.873m^2\) radius 12.5m, \(706.858m^2\) for radius 15m, \(1256.637m^2\) for radius 20m.
What is area of a circle?The region encircled by a circle with radius r is known as πr² in geometry. Here, the Greek letter stands for the constant proportion of a circle's circumference to its diameter, which is roughly equivalent to 3.14159.
This formula, which was first discovered by Archimedes, can be derived by considering the circle as the boundary of a series of regular polygons. A regular polygon's area is equal to half its perimeter times the distance from its center to its sides. The equivalent formula, \(A=\frac{1}{2} *2\pi r*r\) states that the area is equal to half the perimeter times the radius.
The limit for a circle is held by \(\pi r^{2}\).
Calculation:Given;
1) r=12.5m
\(A=\pi r^2=\pi (12.5)^2=490.873m^2\)
2) r=15m;
\(A=\pi r^2=\pi (15)^2=706.858m^2\)
3) r=20m;
\(A=\pi r^2=\pi (20)^2=1256.637m^2\)
Areas of Circles are for \(490.873m^2\) radius 12.5m, \(706.858m^2\) for radius 15m, \(1256.637m^2\) for radius 20m.
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An altitude is drawn from the vertex of an isosceles triangle, forming a right angle and two congruent triangles. As a result, the altitude cuts the base into two equal segments. The length of the altitude is 18 inches, and the length of the base is 17 inches. Find the triangle’s perimeter. Round to the nearest tenth of an inch.
Answer: 66.5 inches
Step-by-step explanation:
parallelogram question pls help
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\(p = 2 \times (( - 3x - 5) + (3 - 4x)) \\ \)
Collect like terms
\(p = 2 \times ( - 7x - 2)\)
\(p = - 14x - 4\)
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\(p = 66\)
Thus ;
\( - 14x - 4 = 66\)
Add sides 4
\( - 14x - 4 + 4 = 66 + 4\)
\( - 14x = 70\)
Divide sides by -14
\( \frac{ - 14x}{ - 14} = \frac{70}{ - 14} \\ \)
\(x = - \frac{7 \times 10}{7 \times 2} \\ \)
\(x = - \frac{5 \times 2}{2} \\ \)
\(x = - 5\)
Done...
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For the following right triangle, find the side length x. Round your answer to the nearest hundredth. X, 18, and 10
Answer:
152
Step-by-step explanation:
All segments in a triangle add to 180. 1
8+10+x=180
x=152
The length x using Pythagoras theorem is 15 unit.
What is Pythagoras theorem?According to the Pythagorean theorem, the square of the hypotenuse of a right triangle equals the sum of the squares of the other two sides.
Given:
Hypotenuse = 18 unit
Perpendicular = 10 unit
using Pythagoras theorem
H² = P² + B²
18² = 10² + B²
324 = 100 + B²
324 - 100 = B²
B² = 224
B= 14.966 unit
B= 15 unit
Thus, the measure for x is 15 unit.
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1) the sum of 8 and t
3) the product of 5 and b
Step-by-step explanation:
When we say sum we are referring to addition.
And a number and a variable(letter) can't be added. So the sum of 8 and t can't be added.
The sum of 8 and t is;
8+t
When we talk about product or finding the product of a number we are referring to the number we get after multiplying two or more numbers.
And note that with multiplication, a number and a variable(letter) can be multiplied.
The product of 5 and b is;
5×b=5b
Scale Factor: 1/2; Center: point N
The new coordinates of points M and O is determined as;
M = (0.5, - 1)
O = (2.5, -2).
What is the new coordinate of points of M and O?The new coordinate of points M and O after applying the scale factor is calculated as follows;
The given scale factor = 1/2
The current coordinates of point M and O is;
M = (1, - 2)
O = (5, - 4)
A scale factor can be used to either enlarge a figure or decrease a figure.
When the scale factor is less than 1, it means the new figure will be smaller than the original figure.
However, if the scale factor is greater than 1, the new figure will be greater than the original figure.
The new coordinates of points M and O is determined as follows;
M = (1 x 1/2, -2 x 1/2) = (0.5, - 1)
O = (5 x 1/2, -4 x 1/2) = (2.5, -2)
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(a.) Suppose you have 500 feet of fencing to enclose a rectangular plot of land that borders on a river. If you do not fence the side along the river, find the length and width of the plot that will maximize the area. What is the maximum area?
(b.) A rectangular playground is fenced off and divided in two by another fence parallel to its width. If 900 feet of fencing is used, find the dimensions of the playground that will maximize the enclosed area. What is the maximum area?
(c.) A small car rental agency can rent every one of its 62 cars for $25 a day. For each $1 increase in rate, two fewer cars are rented. Find the rental amount that will maximize the agency's daily revenue. What is the maximum daily revenue?
a.) Suppose you have 500 feet of fencing to enclose a rectangular plot of land that borders on a river. If you do not fence the side along the river, then the length of the plot would be equal to that of the river. Suppose the length of the rectangular plot is x and the width is y.
So, the fencing required would be 2x + y = 500. y = 500 − 2x. The area of the rectangular plot would be xy.
Substitute y = 500 − 2x into the equation for the area.
A = x(500 − 2x) = 500x − 2x²
Now, differentiate the above equation with respect to x.
A = 500x − 2x²
dA/dx = 500 − 4x
Set dA/dx = 0 to get the value of x.500 − 4x = 0or, 500 = 4x
So, x = 125
Substitute x = 125 into y = 500 − 2x to get the value of y.y = 500 − 2x = 250 ft
The maximum area is A = xy = 125 × 250 = 31,250 sq. ft.
b.) Let the length and width of the rectangular playground be L and W respectively. Then, the perimeter of the playground is L + 3W. Given that 900 feet of fencing is used, we have:
L + 3W = 900 => L = 900 − 3W
Area = A = LW = (900 − 3W)W = 900W − 3W²
dA/dW = 900 − 6W = 0W = 150
Substitute the value of W into L = 900 − 3W to get:
L = 900 − 3(150) = 450 feet
So, the dimensions of the playground that will maximize the enclosed area are L = 450 feet, W = 150 feet. The maximum area is A = LW = 450 × 150 = 67,500 square feet.c.)
Let x be the number of $1 increments. Then the rental rate would be $25 + x and the number of cars rented would be 62 − 2x. Hence, the revenue would be (25 + x)(62 − 2x) = 1550 − 38x − 2x²
Differentiating with respect to x, we get dR/dx = −38 − 4x = 0or, x = −9.5. This value of x is not meaningful as rental rates cannot be negative. Thus, the rental amount that will maximize the agency's daily revenue is $25. The maximum daily revenue is R = (25)(62) = $1550.
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According to the information we can conclude that the maximum area for the plot is 15,625 square feet (part a). Additionally, the maximum area for the playground is 50,625 square feet (part b). Finally the maximum daily revenue is $975 (part c).
How to find the dimensions that maximize the area? (part a)To find the dimensions that maximize the area, we can use the formula for the area of a rectangle:
A = length × width.We are given that the total length of fencing available is 500 feet, and since we are not fencing the side along the river, the perimeter of the rectangle is
2w + L = 500Solving for L, we have
L = 500 - 2wSubstituting this into the area formula, we get
A = w(500 - 2w)To find the maximum area, we can take the derivative of A with respect to w, set it equal to zero, and solve for w. The resulting width is 125 feet, and the length is also 125 feet. The maximum area is found by substituting these values into the area formula, giving us
A = 125 × 125 = 15,625 square feet.What is the maximum area? (part b)Similar to the previous problem, we can use the formula for the area of a rectangle to solve this. Let the width of the playground be w, and the length be L. We have
2w + L = 900As we are dividing the playground into two parts with a fence parallel to its width. Solving for L, we get
L = 900 - 2wSubstituting this into the area formula, we have
A = w(900 - 2w)To find the maximum area, we can take the derivative of A with respect to w, set it equal to zero, and solve for w. The resulting width is 225 feet, and the length is also 225 feet. The maximum area is found by substituting these values into the area formula, giving us
A = 225 × 225 = 50,625 square feet.What is the maximum daily revenue? (part c)Let x be the rental rate in dollars. The number of cars rented can be expressed as
62 - 2(x - 25)Since for each $1 increase in rate, two fewer cars are rented. The daily revenue is given by the product of the rental rate and the number of cars rented:
R = x(62 - 2(x - 25))To find the rental amount that maximizes revenue, we can take the derivative of R with respect to x, set it equal to zero, and solve for x. The resulting rental rate is $22. Substituting this into the revenue formula, we find the maximum daily revenue to be
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PLEASE help me with this question! This is really urgent! No nonsense answers please.
Answer:
140°
Step-by-step explanation:
\( \because m\widehat{BG} = 360\degree - m\widehat{GCB} \\
\therefore m\widehat{BG} = 360\degree - 300\degree \\
\therefore m\widehat{BG} = 60\degree \\
\because m\widehat{BGD} = m\widehat{BG}
+m\widehat{GD}\\
\therefore m\widehat{BGD} = 80\degree+60\degree\\
\therefore m\widehat{BGD} = 140\degree\\
\because m\angle BAD = m\widehat{BGD} \\
\huge\purple {\boxed {\therefore m\angle BAD =140\degree}} \)
using the information given, select the statement that can deduce the line segments to be parallel. if there are none, then select none. when m2
When m2 = m3, it implies that the slopes of line segments 2 and 3 are equal. This condition indicates that line segments 2 and 3 are parallel.
In geometry, the slope of a line represents its steepness or inclination. When two lines have the same slope, it means that they have the same steepness or inclination, and therefore, they are parallel.
In the given context, the statement "m2 = m3" suggests that the slopes of line segments 2 and 3 are equal. This implies that both line segments have the same steepness and direction, indicating that they are parallel to each other.
The slope of a line can be determined by comparing the ratio of the vertical change (change in y-coordinates) to the horizontal change (change in x-coordinates). If two lines have the same ratio of vertical change to horizontal change, their slopes will be equal, and they will be parallel.
Therefore, when m2 = m3, we can conclude that the line segments corresponding to m2 and m3 are parallel to each other.
The correct question should be :
Using the information given, select the statement that can deduce the line segments to be parallel. If there are none, then select none.
When m2 = m3
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help me please asap.....
For k = - 3 and n = - 2, the expression evaluates to - 6.
We have the following expression -
- \(k^{2}\) - (9k - 7n) + 5n
We have to evaluate the above expression for k = - 3 and n = - 2.
Evaluate the expression f(x) = ax + b for x = - 2.The expression ax + b for x = - 2 can be evaluated as follows -
Substituting the value of x = - 2, we get : - 2a + b
We can similarly solve the expression given to us -
- \(k^{2}\) - (9k - 7n) + 5n
Substitute k = - 3 and n = - 2 in the equation, we get -
\(-(-3)^{2} - (9\times -3 \;\;-\;\;7\times -2) + 5\times -2\)
- 9 - (- 27 + 14) - 10
- 9 + 27 - 14 - 10
18 - 14 - 10
18 - 24
- 6
Hence, for k = - 3 and n = - 2, the expression evaluates to - 6.
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Which number is equal to 10 Superscript 4?
Answer:
10,000
Step-by-step explanation:
the 4 means to multiply the 10 4 times.
Answer:
10,000
Step-by-step explanation:
Find the arc length of CD
Answer: 15 feet
Step-by-step explanation:
If a random variable has the normal distribution with μ = 30 and σ = 5, find the probability that it will take on the value between 31 and 35.
The probability that the random variable will take on a value between 31 and 35 is 0.2620 or 26.20%.
To solve this problem, we need to standardize the values of 31 and 35 using the formula:
z = (x - μ) / σ
where x is the value we want to find the probability for, μ is the mean, and σ is the standard deviation.
For x = 31:
z = (31 - 30) / 5 = 0.2
For x = 35:
z = (35 - 30) / 5 = 1
Now, we can use a standard normal distribution table or calculator to find the probabilities corresponding to these z-values. The probability of getting a value between 31 and 35 is the difference between the probability of getting a z-value less than 1 and the probability of getting a z-value less than 0.2:
P(31 ≤ x ≤ 35) = P(z ≤ 1) - P(z ≤ 0.2)
= 0.8413 - 0.5793
= 0.2620
Therefore, the probability that the random variable will take on a value between 31 and 35 is 0.2620 or 26.20%.
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What is the area of the shaded portion of the trapezoid in the figure, in terms of? The figure is not drawn to scale. All of the given measurements are in feet.
Answer:
(150-36π) ft^2
Step-by-step explanation:
we need to subtract the area of the circle from the area of the trapezoid to find the area of the shaded region.
area of circle=πr^2=π6^2=36π ft^2
area of trapezoid=(1/2)(a+b)h=(1/2)(12+13)12=150 ft^2
so, the area of trapezoid-area of circle=(150-36π) ft^2
Brenna saved 36% on a $15 pair of sunglasses. Choose the correct expression to find 36% of $15.
36 × 15
36 × 0.15
3.6 × 15
0.36 × 15
Answer:
D) 0.36 × 15-----------------------
Find the expression36% of 15 36/100 × 15= 0.36 × 15Correct choice is D
Answer:
0.36 × 15
Step-by-step explanation:
To find a percentage of a number, convert the percentage to its decimal equivalent, then multiply it by the number.
\(\begin{aligned}\implies 36\% \;\textsf{of}\; $15&=\dfrac{36}{100} \times 15\\&=0.36 \times 15\\&=5.4\end{aligned}\)
Therefore, the correct expression to find 36% of $15 is:
0.36 × 15For this experiment you have been randomly assigned to a group consisting of you and one other person. You do not know now, nor will you ever know, who this other person is. For this experiment all you have to do is distribute your 10 points into two accounts. One account called KEEP and one account called GIVE. The GIVE account is a group account between you and your group member. For every point that you (or your group member) put in the GIVE account, I will add to it 50% more points and then redistribute these points evenly to you and your group member. The sum of the points you put in KEEP and GIVE must equal the total 10 points. Any points you put in the KEEP account are kept by you and are part of your score on this experiment. Your score on the experiment is the sum of the points from your KEEP account and any amount you get from the GIVE account. For example, suppose that two people are grouped together. Person A and Person B. If A designates 5 points in KEEP and 5 points in GIVE and person B designates 10 points to KEEP and 0 points to GIVE then each person’s experiment grade is calculated in this manner: Person A’s experiment grade = (A’s KEEP) + 1.5(Sum of the two GIVE accounts)/2 = 5 +(1.5)(0+5)/2= 5 + 3.75 = 8.75. Person A’s score then is 8.75 out of 10. Person B’s experiment grade = (B’s KEEP) + 1.5(Sum of the two GIVE accounts)/2 = 10 +(1.5)(0+5)/2 = 10 + 3.75. Person B’s score then is 13.75 out of 10. (you can think of any points over 10 as extra credit) In this module’s activity you were asked to make a decision about how to invest your resources (points). This activity is a classic strategic game where the good of the individual is at odds with the good for the group. These problems are pervasive in risk management. For example, a physician who is trained to treat diseases may be reluctant to discuss alternative treatments with a patient when the physician is sure that a specific treatment is the only truly viable treatment. Nonetheless, you have learned in this course that physicians (or an agent of the physician) must have this discussion and bow to the will of the patient even if, in the physician’s judgment, the patient chooses an alternative treatment which is likely to be superfluous. In this way, informed consent and patient education are nuisances to the physician but are very important to protect the group (maybe a hospital or surgical group) from liability. In light of recent events another example is warranted. Individuals may choose to not get vaccinated since they do not want to bear the risk of any possible adverse side-effects of a vaccine. This is perfectly reasonable to do so. The problem arises when large groups of people choose to not get vaccinated thus making the impact of the disease relatively larger than need be if everyone would choose to take a vaccine (remember our first cost-benefit experiment). This implies that individual’s rights to choose not to vaccinate are at odds with what is good for the group of individuals. These types of problems are common in risk management. Discussion: (If you post your answers to each of the four questions below before the deadline, you will get the full ten points for the discussion. The questions do not need to be answered mathematically or with a calculation. If you feel the need to use mathematics to make a calculation, then you are free to do so but the questions are merely asking you for a number and how you arrived at that number. If you do not do any calculations to arrive at the number, just say how you arrived at the number. (There are no incorrect answers.) 1. In this activity how did you arrive at your decision on the keep-give split? 2. What is the best outcome of this situation for you? 3. What is the best outcome of this situation for the group? 4. Can you see any parallels with this game and how risk management strategies work? Explain.
1. I based my decision on allocating points to maximize my own score, while also considering the potential benefits of contributing to the group fund.
2. The best outcome for me would be allocating the minimum points required to the GIVE account, while putting the majority in the KEEP account. This would ensure I receive the most points for myself.
3. The best outcome for the group would be if both participants maximized their contributions to the GIVE account. This would create the largest group fund, resulting in the most redistributed points and highest average score.
4. There are parallels with risk management strategies. Individuals may act in their own self-interest, but a larger group benefit could be achieved if more participants contributed to "group" risk management strategies like vaccination, safety protocols, insurance policies, etc. However, some individuals may free ride on others' contributions while benefiting from the overall results. Incentivizing group participation can help align individual and group interests.
6 x 10^9 divide 3x10^4 = ____x10^?
Answer:
2 × 10⁵
Step-by-step explanation:
The following data were obtained from the question:
6×10⁹/ 3×10⁴ =?
The above expression can be simplified as follow:
6×10⁹/ 3×10⁴ = 6×10⁹ ÷ 3×10⁴
Recall:
Aᵐ ÷ Aⁿ = Aᵐ ¯ ⁿ
Therefore,
6×10⁹ ÷ 3×10⁴ = (6/3) × 10⁹ ¯ ⁴
6×10⁹ ÷ 3×10⁴ = 2 × 10⁵
Thus, 6×10⁹/ 3×10⁴ is equal to 2 × 10⁵
HELP!!!! please im begging
Answer:
57 1/10
(14× 3/4)+(4× 1/2)+(8× 1/2)+(10× 2/5)+(10× 2/5)+(12× 4/5)= 571/10 or 57× 1/10
PLS HELP ASAP
simplify the expression that enter your answer below x + 2 x + 5 x
Answer:
8x
Step-by-step explanation:
Combine Like Terms:
= x+2x+5x
= (x+2x+5x)
= 8x
Determine graphically whether the ordered pair (0, 2) is a solution of the following system of equations, and check using algebra.
x + 3y= 4
3x+y = -2
Answer: Not a solution of the System
Step-by-step explanation:
Plug in 0 for x and 2 for y for both equations.
Note, if only one of the equations is a true statement
(0.2) is not a solution. If either one of the equation is not true, the ordered pair is not a solution.
0+3(2)=4
3*2=6
0+6=6
6≠4
This was only the first equation but it was not true.
The equation is not true, so (0, 2) is not a solution of the second equation. Therefore, (0, 2) is not a solution of the system of equations.
To determine graphically whether the ordered pair (0, 2) is a solution of the system of equations, we can plot the two equations on a graph. If the point (0, 2) lies on both lines, then it is a solution of the system.
The first equation is x + 3y = 4. To plot this equation, we can first solve for y:
y = -(1/3)x + 4/3
This equation has a slope of -1/3 and a y-intercept of 4/3. So, the line will rise 1 unit for every 3 units it moves to the left. The y-intercept is 4/3, so the line will pass through the point (0, 4/3). Three units to the left of (0, 4/3) is (-3, 7/3), so the line will also pass through this point.
The second equation is 3x + y = -2. To plot this equation, we can first solve for y:
y = -3x - 2
This equation has a slope of -3 and a y-intercept of -2. So, the line will fall 3 units for every 1 unit it moves to the right. The y-intercept is -2, so the line will pass through the point (0, -2). One unit to the right of (0, -2) is (1, -5), so the line will also pass through this point.
We can check this algebraically. Substituting (0, 2) into the first equation, we get:
0 + 3× 2 = 4
6 ≠ 4
This equation is not true, so (0, 2) is not a solution of the first equation. Substituting (0, 2) into the second equation, we get:
3 × 0 + 2 = -2
2 = -2
This equation is also not true, so (0, 2) is not a solution of the second equation. Therefore, (0, 2) is not a solution of the system of equations.
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Mrs. Chen bought a big tub of 250 plastic geometric pieces to use in her math classes. The pieces are all a similar size but different shapes. She randomly selects a handful of pieces from the tub. The table below shows the geometric shapes she selects.
Geometric shape Number selected
triangle 3
square 2
hexagon 2
pentagon 4
rectangle 2
Based on the data, estimate how many pentagons are in the tub.
If necessary, round your answer to the nearest whole number.
Answer:
To estimate the number of pentagons in the tub, we can use the proportion of pentagons in the sample of geometric shapes that Mrs. Chen selected and apply it to the total number of geometric shapes in the tub.
The proportion of pentagons in the sample is:
4 / (3 + 2 + 2 + 4 + 2) = 4 / 13 ≈ 0.31
We can assume that this proportion is representative of the entire tub of geometric shapes, and we can apply it to the total number of geometric shapes in the tub:
0.31 x 250 ≈ 77.5
Rounding to the nearest whole number, we can estimate that there are approximately 78 pentagons in the tub.
Therefore, the estimated number of pentagons in the tub is 78.
Rachel works for a clothing store. She is paid $150 every week plus a 10% commission on any clothes that she sells.
Answer:
$165
Step-by-step explanation:
Rachel works for a clothing store. She is paid $150 every week plus a 10% commission on any clothes that she sells.
Let's find the total amount she is being paid per week
Amount paid originally = $150
Percentage Commission = 10%
Commission = 10% of 150
Commission = 0.1×150
Commission = $15
Total amount paid = originally amount + Commission
Total amount paid = $150+$15
Total amount paid =$165
Hence the amount paid to Rachel okus Commission is $165
Discuss the downsizing process in your own words and provide an
example.
Downsizing refers to the process of reducing the size and workforce of a company to cut costs, increase efficiency, or adapt to changing market conditions. It involves eliminating positions, reducing staff numbers, or even closing down certain business units or branches.
Downsizing can occur for various reasons, such as financial difficulties, mergers and acquisitions, technological advancements, or strategic reorganization. Companies often assess their operational costs and decide to downsize to improve their financial performance.
During the downsizing process, companies may calculate the potential cost savings by considering factors such as salaries, benefits, severance packages, and operational expenses. For example, if a company decides to eliminate 100 positions with an average salary of $50,000 per year, it could result in annual savings of $5 million.
While downsizing can help companies achieve short-term cost reductions, it often has significant implications for the affected employees, including layoffs, reduced morale, and increased workload for remaining staff. It is crucial for organizations to handle the downsizing process with sensitivity and transparency, providing support to affected employees and communicating the rationale behind the decisions.
It is important to note that downsizing should not be seen as a long-term solution, but rather as a strategic measure to address specific challenges. Companies should also explore alternatives to downsizing, such as retraining and redeploying employees, implementing productivity improvements, or seeking new business opportunities, to ensure sustainable growth and success in the long run.
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a 75 kg athlete running a 7.0-minute mile: ____ M
1609.34 meters (M).
To determine this, we first need to convert the 7.0-minute mile to seconds, since we need to use the same units for time in our calculations.
7.0 minutes x 60 seconds/minute = 420 seconds
Next, we need to convert the distance of one mile to meters, since we need to use the same units for distance in our calculations.
1 mile = 1609.34 meters
Finally, we can use the formula for speed to find the content loaded of the athlete running a 7.0-minute mile:
Speed = Distance / Time
Speed = 1609.34 meters / 420 seconds
Speed = 3.83 meters/second
Therefore, the content loaded of a 75 kg athlete running a 7.0-minute mile is equal to 1609.34 meters (M).
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Help! :D I just don’t understand!!
(Hey, angles rock!)
Answer:
45 + 60 = 105
Step-by-step explanation:
ABC consists of two angles, angle ABD and angle DBC. Therefore, the sum of the measures of angles ABD and DBC is the measure of ABC.
45 + 60 = 105
The Bureau of Labor Statistics announces that last month It interviewed all members of the labor force in sample of 55.000 households: 4.9% of the people interviewed were unemployed The boldface number margin of error: parameter: statistic. If the value 36 is not row in Student $ distribution Table what value should be used for the degrees of freedom? A.30 C.40 D. 100 Suppose sample 0f 37 students is drawn from large lecture. What is the value of the degrees of freedom? A. 36 B. 37 D. 38 A random sample of 14 evenings (6 to 9 PM: at the 0 Sullivan household showed the family received an average of 5.2 solicitation phone calls each evening The sample standard deviation was 1.9. Find 9590 confidence interval for the population mean number of solicitation calls this family receives each night 20. Computer Depot is large store that sells and repairs computers_ random sample of H0 computer repair jobs took technicians an average of 93.2 minutes per computer: Assume that & is known t0 be 16,9 minutes, Find 99" confidence interval for the population mean time for computer repairs.
The degree of freedom would be 36.
What is the degree of freedom in statistics?
It is a mathematical equation that tells how many values can vary and can aid in determining whether or not the results are statistically significant. In statistics, the most commonly encountered equation for determining degrees of freedom is df = N-1.
Que.16)
It is a statistic. Because it gives information about the sample.
Que.17)
Because 35 is close to 36.
Que.18)
degrees of freedom = n -1 = 37-1 = 36
Que .19)
\(C.I. = \bar{X} \ \pm \ t_{\alpha/2, n-1} \ \frac{s}{\sqrt{n}} \\ \\ \\ C.I. = 5.2 \pm 2.160 \ \frac{1.9}{\sqrt{14}} \\\\\\ C.I. = (4.1032, 6.2968)\)
\(t_{\alpha/2, n-1} = t_{0.05/2, 14-1} = 2.16\) it is obtained using t table.
Que. 20)
\(\\ C.I. = \bar{X} \pm z_{\alpha /2} \ \frac{\sigma }{\sqrt{n}} \\ \\ \\ C.I. = 93.2 \pm 2.58 \frac{16.9}{\sqrt{110}} \\\\\\ C.I. = (89.0427, 97.3573)\)
Hence, the degree of freedom would be 36.
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7. The floor area of a passage is 2,4 m². The floor has to be tiled with square tiles of which the length of the sides is 200 mm. How many tiles do you need to cover the floor?
The number of tiles needed to cover the floor is 60 tiles.
Given Information,
The floor area of the passage = 2.4 m²
Length of a side of square tile = 200mm
Length of the side is in mm which needs to be converted in its standard form which is meters.
Therefore, the length of side = 200/1000 m
= 0.2 m
Area of the square tile = 0.2 x 0.2
= 0.04 m²
Let the number of tiles be x.
∴ Number of tiles = \(\frac{Area of passage}{Area of each tile}\)
x = 2.4/0.04
x = 60
∴ The number of tiles needed to cover the floor is 60 tiles.
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precalculus: concepts through functions - a unit circle approach to trigonometry, 4 th edition, by sullivan and sullivan.
Mike Sullivan recently retired as Professor of Mathematics at Chicago State University, having taught there for more than 30 years. He received his PhD in mathematics from Illinois Institute of Technology.
He is a native of Chicago’s South Side and currently resides in Oak Lawn, Illinois. Mike has 4 children; the 2 oldest have degrees in mathematics and assisted in proofing, checking examples and exercises, and writing solutions manuals for this project. His son Mike Sullivan, III co-authored the Sullivan Graphing with Data Analysis series as well as this series. Mike has authored or co-authored more than 10 books. He owns a travel agency and splits his time between a condo in Naples, Florida and a home in Oak Lawn, where he enjoys gardening.
Michael Sullivan, III has training in mathematics, statistics and economics, with a varied teaching background that includes 27 years of instruction in both high school and college-level mathematics. He is currently a full-time professor of mathematics at Joliet Junior College. Michael has numerous textbooks in publication, including an Introductory Statistics series and a Precalculus series which he writes with his father, Michael Sullivan.
Michael believes that his experiences writing texts for college-level math and statistics courses give him a unique perspective as to where students are headed once they leave the developmental mathematics tract. This experience is reflected in the philosophy and presentation of his developmental text series. When not in the classroom or writing, Michael enjoys spending time with his 3 children, Michael, Kevin and Marissa, and playing golf. Now that his 2 sons are getting older, he has the opportunity to do both at the same time!
Product details
Publisher : Pearson; 4th edition (8 January 2018)
Language : English
Hardcover : 1224 pages
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A student is taking a multiple-choice math test. He has two questions left to answer. The first question has the four answer choices of A, B, C, and D. The second question has the five answer choices A, B, C, D, and E. The student randomly selects an answer for each question. Construct a sample space showing all the possible outcomes the student could answer the two questions
There are 4 possible answers for the first question and 5 possible answers for the second question, so there are a total of 4 x 5 = 20 possible outcomes.
What is Sample Space ?A set of potential outcomes from a random experiment is known as a sample space. The sample space is identified by the letter "S." Events are the subset of possible experiment results.The results in a sample area could vary depending on the experiment. Discrete or finite sample spaces are those that have a finite number of outcomes.
The sample space showing all possible outcomes of the two questions is the Cartesian product of the two sets of answer choices, which is:
{(A, A), "(A, B), "(A, C), "(A, D), "(A, E), "(C, A), "(C, B), "(C, C), "(C, D), "(C, E")," "(D, A), "(D, B), "(D, C), "(D, D), "(D, E)}.
There are 4 possible answers for the first question and 5 possible answers for the second question, so there are a total of 4 x 5 = 20 possible outcomes. Each outcome is a pair of answers, where the first element of the pair is the answer to the first question and the second element of the pair is the answer to the second question.
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Alaina is giving a presentation about how the average college student spends their day. Through her research, she finds that most college students spend 30% of their day sleeping, 20% in class, 20% studying, and 30% socializing/participating in extracurricular activities. How should she graphically display this information in her presentation?
In her presentation, Alaina can use a pie chart to show information about how the typical college student spends their day.
A circular chart that has been divided into sectors or "pie slices" to represent numerical proportions is known as a pie chart. Each pie slice symbolises a percentage, and each slice's size is proportional to the percentage it represents.
In this instance, Alaina can separate the pie chart into four segments that stand in for the various activities that college students engage in throughout the day: sleeping, attending classes, studying, and participating in extracurricular activities. She can give each slice a unique colour and a label indicating the proportion it represents.
The pie chart, for instance, might have the following slices:
-30% of people are sleeping (blue).
- 20% of the class (in green)
20% of study time (coloured)
30% of time for socializing
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Given the equation below , if x = 5 , what is the value of y?
y= 7.25x
Answer:
y=36.25
Step-by-step explanation:
substitute x
y=7.25(5)
y=36.25
Answer:
y=36.25
Step-by-step explanation:
We are given
y= 7.25x
and
x=5
We know that x is equal to 5, therefore we can substitute 5 in for x.
y= 7.25x
y=7.25(5)
Multiply 7.25 and 5
y=36.25