ILL GIVE BRAINLEST:))
Answer:
2 and 3
Step-by-step explanation:
2) If two polygons are similar, the ratio of their areas is equal to the square of the ratio of their corresponding sides.
side ratio: 1/4------- area ratio: 1²/4² = 1/16 = 1:16 ratio
3)If two polygons are similar, then the ratio of their perimeters is equal to the ratios of their corresponding side lengths.
The ratio of the perimeters is the same as the scale factor.
scale 1:4
solve the inequality and graph its solutions on a number line. 5x+3<3(x+2)
Answer:
B
Step-by-step explanation:
What are the slope and the y-intercept of the linear function that is represented by the graph? On a coordinate plane, a line goes through points (0, negative 2) and (3, 0). The slope is Two-thirds, and the y-intercept is –2. The slope is Two-thirds, and the y-intercept is 3. The slope is Three-halves, and the y-intercept is –2. The slope is Three-halves, and the y-intercept is 3.
Answer:
the slope is 2/3 and the y-intercept is -2
The slope and the y-intercept of the linear function represented by the graph are 2/3 and -2, respectively.
What is meant by linear function?A linear function is one that, when graphed, produces a straight line. Thus, non-linear functions are any non-linear functions. Although graphing is the quickest way to determine whether a function is linear or non-linear, we can also determine linearity from its input/output table or equation.
So the way to describe linear functions is that for any given change in x, the change in y will always be the same value. You're dealing with a linear function if it always returns the same value.
Therefore,
Any line's slope - intercept form is
y = mx + c
Where m = Slope of the line
c = y - intercept of the line
The given points in this case are (0, - 2) and
The equation of the line passing through the points (0, - 2) and (3, 0) is now complete.
\(&\frac{y+2}{x-0}=\frac{0+2}{3-0} \\\)
\(&\Longrightarrow \frac{y+2}{x}=\frac{2}{3} \\\)
\(&\Longrightarrow y+2=\frac{2}{3} x \\\)
\(&\Longrightarrow y=\frac{2}{3} x-2\)
Which of the slope - intercept form y = mx + c
Where m = 2/3 and c = -2
Thus, Two/thirds is the slope, and -2 is the y-intercept.
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Find the missing side for each triangle below
Applying the Trigonometry ratio, CAH, the missing side is, x = 1.9.
How to Solve a Right Triangle Using Trigonometry RatioThe Trigonometry Ratios are:
SOH - sin∅ = opp/hyp.CAH - cos∅ = adj/hyp.TOA - tan∅ = opp/adj.Thus, given:
∅ = 51°
hyp = 3
adj = x
Apply, CAH:cos 51 = x/3
x = (cos 51)(3)
x = 1.9
Thus, applying the Trigonometry ratio, CAH, the missing side is, x = 1.9.
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Summer camp has 80 kids in the program. They have 15 preschoolers and 40 elementary school kids. How many middle school kids are in the program?
As long as there are no high schoolers there would be 25 middle schoolers. 80-(40+15)=25
Use elimination to solve for x and y: -2x-y=9 2x-9y=1
Group of answer choices A. (5, 1) B. (-1, -7) C. (-4, -1) D. (-1, -4)
Answer:
C
Step-by-step explanation:
Label the two equations:
-2x -y= 9 -----(1)
2x -9y= 1 -----(2)
(1) +(2):
-2x -y +2x -9y= 9 +1
-2x +2x -y -9y= 10
Simplify:
-10y= 10
y= 10 ÷(-10)
y= -1
Substitute y= -1 into (2):
2x -9(-1)= 1
2x +9= 1
2x= 1 -9
2x= -8
x= -8 ÷2
x= -4
Thus, the solution is (-4, -1).
Help me find the answer for this question
The graphs of the functions f(x) and g(x) are attached with the answer.
What is a function?In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y.The set X is called the domain of the function and the set Y is called the codomain of the function.Functions whose domain are the non - negative integers, known as sequences, are often defined by recurrence relations.Given a function as \(${\displaystyle f\colon X\to Y}\) its graph is, formally, the set -\(${\displaystyle G=\{(x,f(x))\mid x\in X\}.}\)
Given are the functions f(x) and g(x).
The given functions are -
f(x) = \($100(\frac{3}{5})^{x}\)
g(x) = \($100(\frac{2}{5})^{x}\)
Refer to the graphs of the function f(x) and g(x).
Therefore, the graphs of the functions f(x) and g(x) are attached with the answer.
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A distribution with three or more peaks is said to be
When a distribution has three or more peaks then it is said to be a multimodal distribution .
What are the types of distributions ?In histograms, there are often three types of distributions which are classified according to the number of peaks that they have . A unimodal distribution would be a histogram that has a single peak in its distribution .
Then there are binomial distributions which boast of having two peaks , Then finally, there is the multimodal distribution which is for all distributions with either three peaks, or more than that .
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will the contents of a cylindrical can of soup with a 1.5-inch radius and a 5-inch height fit into a pan with a 4-inch radius and 3-inch height?
Answer:
Answer: The volume of the soup can is less that that of the pan, so the soup will fit in the pan.
Step-by-step explanation:
a. V = s3
V = (7 km)3
V = 7 km × 7 km × 7 km
V = 343 km3
b. V = s3
V = (11 yd.)3
V = 11 yd. × 11 yd. × 11 yd.
V = 1,331 km cu. yd.
a. V = l × w × h
V = 6 m × 2 m × 3 m
V = 36 m3
b. V = l × w × h
V = 5 ft. × 10 ft. × 8 ft.
V = 400 cu. ft.
a. V = πr2h
V = 3.14 × (3 in.)2 × 3 in.
V = 3.14 × 9 sq. in. × 3 in.
V = 84.78 cu. in.
b. V = πr2h
V = 3.14 × (1 m)2 × 4 m
V = 3.14 × 1 m2 × 4 m
V = 12.56 m3
V = s3
V = (2 ft.)3
V = 2 ft. × 2 ft. × 2 ft.
V = 8 cu. ft.
Answer: The capacity of the ice chest is 8 cubic feet.
V = πr2h
V = 3.14 × (1 ft.)2 × 3 ft.
V = 3.14 × 1 sq. ft. × 3 ft.
V = 9.42 cu. ft.
Answer: The volume of the trash can is 9.42 cubic feet.
Closet #1
V = l × w × h
V = 4 ft. × 5 ft. × 8 ft.
V = 160 cu. ft.
Closet #2
V = l × w × h
V = 6 ft. × 3 ft. × 8 ft.
V = 144 cu. ft.
Compare the size of the closets
160 cu. ft. > 144 cu. ft.
Answer: The first closet is larger.
Both the can and the pan are cylindrical shapes. Compare the volumes of the two objects.
Volume of Can
V = πr2h
V = 3.14 × (1.5 in.)2 × 5 in.
V = 3.14 × 2.25 sq. in. × 5 in.
V = 35.325 cu. in.
Volume of Pan
V = πr2h
V = 3.14 × (4 in.)2 × 3 in.
V = 3.14 × 16 sq. in.× 3 in.
V = 150.72 cu. in.
35.325 cu. in. soup can < 150.72 cu. in pan
Answer: The volume of the soup can is less that that of the pan, so the soup will fit in the pan.
Answer:
1.
a. V = s3
V = (7 km)3
V = 7 km × 7 km × 7 km
V = 343 km3
b. V = s3
V = (11 yd.)3
V = 11 yd. × 11 yd. × 11 yd.
V = 1,331 km cu. yd.
2.
a. V = l × w × h
V = 6 m × 2 m × 3 m
V = 36 m3
b. V = l × w × h
V = 5 ft. × 10 ft. × 8 ft.
V = 400 cu. ft.
3.
a. V = πr2h
V = 3.14 × (3 in.)2 × 3 in.
V = 3.14 × 9 sq. in. × 3 in.
V = 84.78 cu. in.
b. V = πr2h
V = 3.14 × (1 m)2 × 4 m
V = 3.14 × 1 m2 × 4 m
V = 12.56 m3
5.
V = s3
V = (2 ft.)3
V = 2 ft. × 2 ft. × 2 ft.
V = 8 cu. ft.
Answer: The capacity of the ice chest is 8 cubic feet.
V = πr2h
V = 3.14 × (1 ft.)2 × 3 ft.
V = 3.14 × 1 sq. ft. × 3 ft.
V = 9.42 cu. ft.
Answer: The volume of the trash can is 9.42 cubic feet.
Closet #1
V = l × w × h
V = 4 ft. × 5 ft. × 8 ft.
V = 160 cu. ft.
Closet #2
V = l × w × h
V = 6 ft. × 3 ft. × 8 ft.
V = 144 cu. ft.
Compare the size of the closets
160 cu. ft. > 144 cu. ft.
Answer: The first closet is larger.
Both the can and the pan are cylindrical shapes. Compare the volumes of the two objects.
Volume of Can
6.
V = πr2h
V = 3.14 × (1.5 in.)2 × 5 in.
V = 3.14 × 2.25 sq. in. × 5 in.
V = 35.325 cu. in.
Volume of Pan
V = πr2h
V = 3.14 × (4 in.)2 × 3 in.
V = 3.14 × 16 sq. in.× 3 in.
V = 150.72 cu. in.
35.325 cu. in. soup can < 150.72 cu. in pan
Answer: The volume of the soup can is less that that of the pan, so the soup will fit in the pan.Step-by-step explanation:
Find the axis of symmetry of the parabola y=2x^2+4x-1
Answer:22
Step-by-step explanation:
Add
Multiply
Divide
Drag the tiles to the correct boxes to complete the pairs. Match each function to its domain and range.
Matching of the functions domain and range are as follows:
f(x) = 4-4x ;
Domain:{0,1,3,5,6}
Range;{-20,-16,-8,0,4}
f(x) = 5x - 3
Domain:{-2,-1,0,3,4}
Range:{-13,-8,-3,12,4}
f(x) = -10x
Domain:{-4,-2,0,2,4}
Range:{-40,-20,0,20,40}
f(x) = (3/x) + 1.5
Domain:{-3,-2,-1,2,6}
Range:{0.5,0,-1.5,3,2}.
How to find the domain and range of the functions?1) The function f(x) = 4 - 4x
Take Domain:{0,1,3,5,6}
If, we take x=0 and put in the function then we get
f(x)=4-0
f(x)=4
put x=1
f(x) = 4 - 4 =0
put x=3 then we get
f(x)=4-12=--8
put x=5 them we get
f(x)=4-20=-16
put x=6 then we get
f(x)=4-24=-20
Therefore ,range:[-20,-16,-8,0,4}
2) The function f(x)=5x-3
Take domain{-2,-1,0,3,4}
Now, put x=-2 in the function then we get
f(x) = -13
now put x=-1 then we get
f(x)=-5-3=-8
Put x=0 then we get
f(x)=0-3=-3
Put x=3 then we get
f(x)=15-3=12
Put x=4 then we get
f(x)=20-3=17
Therefore , range:{-13,-8,-3,12,17}
3) The function f(x)=-10x
Take domain:{-4,-2,0,2,4}
Put x=-4 in the function then we get
f(x)=40
Put x= -2 then we get
f(x)=20
Put x=0 then we get
f(x)=0
Put x=2 then we get
f(x)=-20
Put x=4 then we get
f(x)=-40
Therefore , range :{-40,-20,0,20,40}
4) The function f(x)= (3/x) + 1.5
Take domain:{-3,-2,-1,2,6}
Put x= -3 in the taken function then we get
f(x)=-1+1.5=0.5
put x=-2 then we get
f(x)= -1.5+1.5=0
Put x=-1 then we get
f(x)=-3+1.5=-1.5
Put x= 2 then we get
f(x)=1.5+1.5=3
Put x= 6 then we get
f(x)=0.5+1.5=2
Therefore, range : {0.5,0,-1.5,3,2}.
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On each coordinate plane, the parent function f(x) = |x| is represented by a dashed line and a translation is represented by a solid line. Which graph represents the translation g(x) = |x + 2| as a solid line?
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (2, 0).
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (0, negative 2).
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (negative 2, 0).
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (0, 2).
Using shifting concepts, we get that the graph that represents the translation g(x) = |x + 2| as a solid line is:
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (-2, 0).
--------------------------------------------------
Shifting a function f(x) a units to the left is the same as finding f(x + a).--------------------------------------------------
The vertex of the function f(x) = |x| is at the point where x = 0, and thus, f(x) = 0. Thus, the vertex of the dashed line is at (0,0).The vertex of the function g(x) = |x + 2| is at the point where \(x + 2 = 0 \rightarrow x = -2\), g(-2) = |-2 + 2| = 0. Thus, the vertex of the solid line is at (-2,0).Thus, the correct option is:
On a coordinate plane, a dashed line absolute value graph has a vertex at (0, 0). A solid line absolute value graph has a vertex at (-2, 0).
At the end of the exercises, there are are the graphs of those two functions, considering the dashed line as the red line and the solid line as the blue line.
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Answer:
Not D
Step-by-step explanation:
Petty sure It's C
A baking scale measures mass to the tenth of a gram, up to 650 grams. Which of the following measurements is possible using this scale?
742.5 grams
300.0 grams
85.25 grams
370 milligrams
The possible measures using this scale are 742.5 grams and 300.0 grams.
What is a scale?The link between a measurement on a model and the corresponding measurement on the real item is represented by scale.
Note that a tenth of a gram is 0.1 grams, therefore, the precision of the scale is 0.1 grams.
Note that 370 milligrams are equivalent to 0.370 grams.
Since the measures on the scale increase by 0.1 units, 0.25 and 0.370 are not possible on this scale.
Hence, the possible measures using this scale are 742.5 grams and 300.0 grams.
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A single filer had a taxable income of $90,725. Base on table, what is is the tax?
The amount that the taxpayer is owing in taxes is $2,691.05.
We have,
Income tax payable refers to a business organization's tax liability to the government in the jurisdiction in which it operates. The amount of liability will be determined by the company's profitability over a given time period and the applicable tax rates. Tax payable is considered a current liability rather than a long-term liability because it must be settled within the next 12 months.
Based on the table, we are using the tax rate of 15% for the taxable income of $11,757.
The tax payable will equals to:
= 15%*$11,757 + $927.50
= $1,763.55 + $927.50
= $2,691.05
Hence, The amount that the taxpayer is owing in taxes is $2,691.05.
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complete question:
Based on this table, if someone had a taxable income of $11,757, how much would they owe in taxes?
A package contains 20 golf balls. The total
weight of the golf balls is 32 ounces. Use the
model to show the number of ounces per
golf ball and the number of golf balls per
ounce. Write your answers in the blanks.
Answer: 1.6
Step-by-step explanation:
each golf is 1.6 ounces and you 20 golf balls in order to reach 32 ounces
Answer:
shown below
Step-by-step explanation:
golf balls per ounce = 5/8 or 0.625
ounces per gold ball = 8/5 or 1.6
explain why the equation to 3x - 5 = 6X + 8 has no solutions
Answer:
There is no solution if considers x different from X.
Step-by-step explanation:
3x - 5 = 6X + 8, has no solution because there are two variables and only one equation (asuming x is diferent of X) . In otherwise there is a solution.
. Suppose a refrigerator that sells for $700 costs $85 a year for electricity. Write an expression for the cost to buy and run this refrigerator for x years. 2. Suppose another refrigerator costs $1000 and $25 a year for electricity. Write an expression for the total cost for the refrigerator over x years. 3. Over 10 years which refrigerator costs the most? By how much? 4. In how many years will the total costs for the two refrigerators be equal?
Hello!
1. Write an expression for the cost to buy and run this refrigerator for x years.costs: $700
each year: $85
So, for x years, the expression will be:
\(f\mleft(x\mright)=85x+700\)2. Write an expression for the total cost for the refrigerator over x years.Let's do the same steps:
costs: $1000
each year: $25
So, for x years, we have:
\(g(x)=25x+1000\)3. Over 10 years which refrigerator costs the most? By how much?To solve this question, we just need to replace where is x by 10 in each of the functions, look:
First refrigerator:
\(\begin{gathered} f(x)=85x+700 \\ f(10)=(85\cdot10)+700 \\ f(10)=850+700 \\ f(10)=1550 \end{gathered}\)Second refrigerator:
\(\begin{gathered} g(x)=25x+1000 \\ g(10)=(25\cdot10)+1000 \\ g(10)=250+1000 \\ g(10)=1250 \end{gathered}\)So, the first refrigerator costs the most. The difference between the two refrigerators equals $300.
4. In how many years will the total costs for the two refrigerators be equal?To find the value which equals the two functions, we just need to equal them, look:
\(\begin{gathered} 85x+700=25x+1000 \\ 85x-25x=1000-700 \\ 60x=300 \\ x=\frac{300}{60} \\ x=5 \end{gathered}\)In five years the costs will be equal, let's prove it:
f(5) = g(5)
(85*5) +700 = (25*5) +1000
425 + 700 = 125 + 1000
1125 = 1125
NO LINKS!! URGENT HELP PLEASE!!
1. Find the area of a regular octagon. Each side is 12 m.
2. The perimeter of a regular polygon is 72 feet. An exterior angle of the polygon measures 40°. Find the length of each side.
3. If the perimeter of a regular pentagon is 50 in. Find the area. Show a drawing and work please.
Answer:
1) 695.3 m²
2) 8 ft
3) 172.0 in²
Step-by-step explanation:
Question 1To find the area of a regular polygon, we can use the following formula:
\(\boxed{\begin{minipage}{5.5cm}\underline{Area of a regular polygon}\\\\$A=\dfrac{s^2n}{4 \tan\left(\dfrac{180^{\circ}}{n}\right)}$\\\\\\where:\\\phantom{ww}$\bullet$ $n$ is the number of sides.\\ \phantom{ww}$\bullet$ $s$ is the side length.\\\end{minipage}}\)
Given the polygon is an octagon, n = 8.
Given each side measures 12 m, s = 12.
Substitute the values of n and s into the formula for area and solve for A:
\(\implies A=\dfrac{(12)^2 \cdot 8}{4 \tan\left(\dfrac{180^{\circ}}{8}\right)}\)
\(\implies A=\dfrac{144 \cdot 8}{4 \tan\left(22.5^{\circ}\right)}\)
\(\implies A=\dfrac{1152}{4 \tan\left(22.5^{\circ}\right)}\)
\(\implies A=\dfrac{288}{\tan\left(22.5^{\circ}\right)}\)
\(\implies A=695.29350...\)
Therefore, the area of a regular octagon with side length 12 m is 695.3 m² rounded to the nearest tenth.
\(\hrulefill\)
Question 2The sum of an interior angle of a regular polygon and its corresponding exterior angle is always 180°.
If the exterior angle of a polygon measures 40°, then its interior angle measures 140°.
To determine the number of sides of the regular polygon given its interior angle, we can use this formula, where n is the number of sides:
\(\boxed{\textsf{Interior angle of a regular polygon} = \dfrac{180^{\circ}(n-2)}{n}}\)
Therefore:
\(\implies 140^{\circ}=\dfrac{180^{\circ}(n-2)}{n}\)
\(\implies 140^{\circ}n=180^{\circ}n - 360^{\circ}\)
\(\implies 40^{\circ}n=360^{\circ}\)
\(\implies n=\dfrac{360^{\circ}}{40^{\circ}}\)
\(\implies n=9\)
Therefore, the regular polygon has 9 sides.
To determine the length of each side, divide the given perimeter by the number of sides:
\(\implies \sf Side\;length=\dfrac{Perimeter}{\textsf{$n$}}\)
\(\implies \sf Side \;length=\dfrac{72}{9}\)
\(\implies \sf Side \;length=8\;ft\)
Therefore, the length of each side of the regular polygon is 8 ft.
\(\hrulefill\)
Question 3The area of a regular polygon can be calculated using the following formula:
\(\boxed{\begin{minipage}{5.5cm}\underline{Area of a regular polygon}\\\\$A=\dfrac{s^2n}{4 \tan\left(\dfrac{180^{\circ}}{n}\right)}$\\\\\\where:\\\phantom{ww}$\bullet$ $n$ is the number of sides.\\ \phantom{ww}$\bullet$ $s$ is the side length.\\\end{minipage}}\)
A regular pentagon has 5 sides, so n = 5.
If its perimeter is 50 inches, then the length of one side is 10 inches, so s = 10.
Substitute the values of s and n into the formula and solve for A:
\(\implies A=\dfrac{(10)^2 \cdot 5}{4 \tan\left(\dfrac{180^{\circ}}{5}\right)}\)
\(\implies A=\dfrac{100 \cdot 5}{4 \tan\left(36^{\circ}\right)}\)
\(\implies A=\dfrac{500}{4 \tan\left(36^{\circ}\right)}\)
\(\implies A=\dfrac{125}{\tan\left(36^{\circ}\right)}\)
\(\implies A=172.047740...\)
Therefore, the area of a regular pentagon with perimeter 50 inches is 172.0 in² rounded to the nearest tenth.
Answer:
1.695.29 m^2
2.8 feet
3. 172.0477 in^2
Step-by-step explanation:
1. The area of a regular octagon can be found using the formula:
\(\boxed{\bold{Area = 2a^2(1 + \sqrt{2})}}\)
where a is the length of one side of the octagon.
In this case, a = 12 m, so the area is:
\(\bold{Area = 2(12 m)^2(1 + \sqrt{2}) = 288m^2(1 + \sqrt2)=695.29 m^2}\)
Therefore, the Area of a regular octagon is 695.29 m^2
2.
The formula for the exterior angle of a regular polygon is:
\(\boxed{\bold{Exterior \:angle = \frac{360^o}{n}}}\)
where n is the number of sides in the polygon.
In this case, the exterior angle is 40°, so we can set up the following equation:
\(\bold{40^o=\frac{ 360^0 }{n}}\)
\(n=\frac{360}{40}=9\)
Therefore, the polygon has n=9 sides.
Perimeter=72ft.
We have
\(\boxed{\bold{Perimeter = n*s}}\)
where n is the number of sides in the polygon and s is the length of one side.
Substituting Value.
72 feet = 9*s
\(\bold{s =\frac{ 72 \:feet }{ 9}}\)
s = 8 feet
Therefore, the length of each side of the polygon is 8 feet.
3.
Solution:
A regular pentagon has five sides of equal length. If the perimeter of the pentagon is 50 in, then each side has a length = \(\bold{\frac{perimeter}{n}=\frac{50}{5 }= 10 in.}\)
The area of a regular pentagon can be found using the following formula:
\(\boxed{\bold{Area = \frac{1}{4}\sqrt{5(5+2\sqrt{5})} *s^2}}\)
where s is the length of one side of the Pentagon.
In this case, s = 10 in, so the area is:
\(\bold{Area= \frac{1}{4}\sqrt{5(5+2\sqrt{5})} *10^2=172.0477 in^2}\)
Drawing: Attachment
In the coming year, a vehicle manufacturer has decided to manufacture 150 vehicles per day. The function v = 150d represents the company’s production for the coming year, v, with respect to the number of days, d.
The rate of change of the function representing the number of vehicles manufactured for the coming year is , and its graph is a . So, the function is a function.
Given:
v = 150d
v represents company's production for the coming year
d represents the number of days
150 is the daily production
The rate of change of the function representing the number of vehicles manufactured for the coming year is CONSTANT (150) , and its graph is a STRAIGHT LINE . So, the function is a LINEAR function.
I hope this helps!
Answer:
v = 150d
v represents company's production for the coming year
d represents the number of days
150 is the daily production
One of the lamp posts at a shopping center has a motion detector on it, and the equation (x+16)2 + (y-13)² = 36 describes the boundary within which motion can be sensed. What is the greatest distance, in feet, a person could be from the lamp and be detected? A. 6 ft B. 12 ft C. 36 ft D. 72 ft
The greatest distance, in feet, a person could be from the lamp and be detected is: B. 12 ft
How to find the greatest distance?The equation (x+16)² + (y-13)² = 36 describes a circle with center (-16,13) and radius 6. The motion detector on the lamp post can detect motion within this circle.
To find the greatest distance a person could be from the lamp and still be detected, we need to find the diameter of the circle, which is equal to twice the radius. Therefore, the greatest distance a person could be from the lamp and still be detected is 2(6) = 12 feet.
Therefore, the correct answer is B) 12 ft.
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A new protein power company claims that the mean time to observe a 10% increase in muscle strength is 7 days with a standard deviation of 5.5 days. A random sample of 25 customers attempted to try this new protein powder. The mean time to find a 10% increase in muscle strength was found to be 9 days. Which of the following statistical test will you use for hypothesis testing? Independent t-test Dependent t-test One sample Z-test ANOVA
Here, we must use one sample z test for the first question.
Since the population standard deviation is known in this instance. According to the new protein powder firm, it takes an average of 7 days to add 10% more muscle, with a population standard variation of 5.5 days.
Here, keep in mind that the t test should be used if the population standard deviations are unknown and the z test should be used if the population standard deviations are known.
The second question requires that we test the hypothesis to determine whether the MoCA test differs between the days before and after several exposures to a new tool.
Here, a z-test with two samples was utilized. Once the hypothesis has been stated, the z Statistic
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A car is driving away from El Paso with constant velocity. At 1 p.m., it is 145 miles away from El Paso. At 3 p.m., it is 275 miles away from El Paso.
Part A: Write a linear function that describes the distance (in miles) the car is from El Paso in terms of time (in hours after 12:00 p.m.).
The linear function that describes the distance (in miles) is therefore y = 65x + 80
How to solve for the linear functionWe have to find the slope and the intercept in other to get the linear function
The data points are:
(1, 145) and (3, 275).
m = (y2 - y1) / (x2 - x1)
fixing the data points we have
m = (275 - 145) / (3 - 1)
= 130 / 2
= 65
y = mx + b
(1, 145):
145 = 65(1) + b
b = 145 - 65
= 80
y intercept is 80
The linear function is therefore y = 65x + 80
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PEOPLE! THIS IS URGENT! PLEASE HELP ME!!!! If the product 3/2 · 4/3 · 5/4 · 6/5 ·…· a/b =9, what is the sum of a and b?
Answer:
35
Step-by-step explanation:
3/2 · 4/3 · 5/4 · 6/5 ·…· a/b =9
a+b=?
------
all numbers get cancelled apart from the first denominator and the last numerator:
1/2*a= 9
a= 18then
b= a-1= 18-1= 17a+b= 18+17= 35
For figure ABCDEF shown here, identify the image after a clockwise rotation of 240°, or counterclockwise
rotation of 120°. The naming always begins at the top of the figure and proceeds clockwise. For example,
a reflection across AD has an image of AFEDCB. Drag and drop each letter into the correct box to identify
the image after a clockwise rotation of 240°, or a counterclockwise rotation of 120°.
Answer:
Step-by-step explanation:
Since, ABCDEF is a regular hexagon,
Measure of central angle of a regular polygon = \(\frac{360}{n}\)
where n = number of sides of the polygon
Measure of central angle of regular hexagon = \(\frac{360}{6}\) = 60°
That means when we rotate a regular hexagon by an angle in the multiple of 60°, hexagon overlaps itself.
Therefore, by the rotation of 240° clockwise, point C will replace the position of point A.
Image of hexagon ABCDEF will become CDEFAB.
Similarly, after rotation by 120° counterclockwise about the center image hexagon will be EDCBAF.
If a relation is represented by a set of ordered pairs, explain how to determine whether the relation is a function.
To determine if the relation is a function, no two ordered pair must have the same abscissa or x coordinate
What is the circumference of this circle? Use π ≈ 3.14. Round your answer to the nearest tenth of a centimeter.
the diameter is 13
The circumference of the given circle is 41 cm
What is a circle?A circle is a round-shaped figure that has no corners or edges. In geometry, a circle can be defined as a closed, two-dimensional curved shape.
The circumference of a circle is the boundary length of the circle, it is basically the perimeter of the circle, in degree measure it can not exceed by 360°
Given that, a circle, with diameter, 13 cm, we need to find it circumference.
We know that, the circumference of a circle is given by,
Circumference of the circle = π × diameter
= 3.14 × 13
= 40.82
≈ 41 cm
Hence, the circumference of the given circle is 41 cm
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prove that there exist only five regular polyhedron
To prove that there are only these five regular polyhedra, we can consider Euler's polyhedron formula, which states that for any convex polyhedron, the number of vertices (V), edges (E), and faces (F) satisfy the equation V - E + F = 2.
Proving there exist Five Regular PolyhedronThe five regular polyhedra, also known as the Platonic solids, are the only convex polyhedra where all faces are congruent regular polygons, and the same number of polygons meet at each vertex.
The five regular polyhedra are:
1. Tetrahedron: It has four triangular faces, and three triangles meet at each vertex.
2. Cube: It has six square faces, and three squares meet at each vertex.
3. Octahedron: It has eight triangular faces, and four triangles meet at each vertex.
4. Dodecahedron: It has twelve pentagonal faces, and three pentagons meet at each vertex.
5. Icosahedron: It has twenty triangular faces, and five triangles meet at each vertex.
To prove that there are only these five regular polyhedra, we can consider Euler's polyhedron formula, which states that:
"for any convex polyhedron, the number of vertices (V), edges (E), and faces (F) satisfy the equation V - E + F = 2".
For regular polyhedra, each face has the same number of sides (n) and each vertex is the meeting point of the same number of edges (k). Therefore, we can rewrite Euler's formula for regular polyhedra as:
V - E + F = 2
=> kV/2 - kE/2 + F = 2
=> k(V/2 - E/2) + F = 2
Since each face has n sides, the total number of edges can be calculated as E = (nF)/2, as each edge is shared by two faces. Substituting this into the equation:
k(V/2 - (nF)/2) + F = 2
=> (kV - knF + 2F)/2 = 2
=> kV - knF + 2F = 4
Now, we need to consider the conditions for a valid polyhedron:
1. The number of faces (F), edges (E), and vertices (V) must be positive integers.
2. The number of sides on each face (n) and the number of edges meeting at each vertex (k) must be positive integers.
Given these conditions, we can analyze the possibilities for different values of n and k. By exploring various combinations, it can be proven that the only valid solutions satisfying the conditions are:
(n, k) pairs:
(3, 3) - Tetrahedron
(4, 3) - Cube
(3, 4) - Octahedron
(5, 3) - Dodecahedron
(3, 5) - Icosahedron
Therefore, there exist only five regular polyhedra.
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plz i need help walk me through it, thanks
Answer:
\(p=36^{\circ}\)
Step-by-step explanation:
We can prove that a tangent will always be perpendicular to the radius touching it. So, the other angle in the diagram is \(90^{\circ}\).
Because all the angles of a triangle sum to \(180^{\circ}\), we have that \(p+54+90=180\).
We combine like terms on the left side to get \(p+144=180\).
We subtract \(144\) on both sides to get \(p=36\).
So, \(\boxed{p=36^{\circ}}\) and we're done!
The Brady & Matthew Camera Company has just come out with their newest professional quality digital camera
The Brady & Matthew Camera Company has recently introduced its latest high-quality digital camera designed for professional use.
1. The Brady & Matthew Camera Company: The company known as Brady & Matthew Camera is the manufacturer of the newly released digital camera.
2. Newest professional quality digital camera: The recently launched camera by Brady & Matthew Camera Company is their latest product in their lineup of professional-grade digital cameras.
3. Features: The new camera is equipped with advanced features that cater to the needs of professional photographers, such as high-resolution image sensors, a wide range of ISO sensitivity, and customizable shooting modes.
4. Image Quality: The camera is designed to deliver exceptional image quality with sharp details, accurate colors, and low noise, ensuring professional-grade results.
5. Durability: The camera is built to withstand the rigors of professional use, featuring a robust body construction and weather sealing to protect against dust and moisture.
6. Ergonomics: Brady & Matthew Camera Company has paid attention to ergonomic design, ensuring that the camera is comfortable to hold and operate for extended periods.
7. Connectivity: The camera is equipped with various connectivity options, including Wi-Fi and Bluetooth, allowing photographers to transfer images wirelessly and control the camera remotely.
8. Accessories: Brady & Matthew Camera Company offers a range of compatible accessories for their new camera, including lenses, external flashes, and battery grips, expanding the capabilities of the camera system.
9. Market Availability: The new professional-quality digital camera by Brady & Matthew Camera Company is now available for purchase from authorized retailers and their official website.
10. Customer Support: The company provides reliable customer support services, including warranty coverage, technical assistance, and firmware updates to ensure a satisfying user experience.
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Please help, I’ll mark your answer as brainliest.
Loudness, pitch, and timbre are the three psychological aspects of sound that are influenced by the physical properties of sound waves.
What is a sound wave?When energy moves through a medium (such as air, water, or any other liquid or solid matter), it creates a pattern of disturbance known as a sound wave that propagates away from the sound source.
When an object vibrates, sound waves are produced that are similar to pressure waves, like when a phone rings.
Pitch, intensity, and timbre are three key components of the field of sound psychology or psychoacoustics. People can distinguish the harmonics of a complex periodic sound wave under certain conditions thanks to the way that humans perceive sound and music.
Thus, loudness, pitch, and timbre are the three psychological aspects of sound that are influenced by the physical properties of sound waves.
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