Answer:
c. Both Tami and Vu performed equally well.
Step-by-step explanation:
To solve this question, we use z score
The formula for calculating a z-score is is z = (x-μ)/σ
where x is the raw score
μ is the population mean
σ is the population standard deviation.
a) For Tami , who took MCAT
We are told:
Scores on the MCAT follow a Normal distribution with a mean of 505.6 points and a standard deviation of 9.3 points.. If Tami earns 524.2 points on the MCAT.
x = 524.2 points
μ = 505.6 points
σ = 9.3 points
z = 524.2 - 505.6/9.3
= 2
The z score for Tami is 2
For Vu, who took LSAT
We were told:
Scores on the LSAT follow a Normal distribution with a mean of 150.7 points and a standard deviation of 10.2 points. Vu earns 171.1 points on the LSAT.
x = 171.1 points
μ = 150.7 points
σ = 10.2 points
z = 171.1 - 150.7/10.2
z = 2
The z score for Vu is also equal to 2
Therefore, we can say the bout Tami and Vu performed equally well.
Option c is the correct answer.
Let P(x) = -50x+20,000x-1,5000,000 represent the profit function for manufacturing a particular model of recreational
vehicle (RV) and x represent the number of RVS produced monthly. Use a compound inequality to state the range of the
number of RVs that need to be sold each month for the company to make a profit.
O 0
100
200
none of the answer choices
O 0
O 100
Among the given answer choices, the correct option that represents this range is "0 100 200 none of the answer choices".
To determine the range of the number of RVs that need to be sold each month for the company to make a profit, we need to consider the profit function and find the values of x that result in a positive profit.
The profit function is given by P(x) = -50x + 20,000x - 1,500,000.
To make a profit, the value of P(x) must be greater than zero (P(x) > 0). We can set up the inequality:
-50x + 20,000x - 1,500,000 > 0.
Combining like terms, we have:
19,950x - 1,500,000 > 0.
Now, let's solve this inequality for x:
19,950x > 1,500,000.
Dividing both sides by 19,950, we get:
x > 1,500,000 / 19,950.
Simplifying the right side, we have:
x > 75.
The range of the number of RVs that need to be sold each month for the company to make a profit is x > 75.
Among the given answer choices, the correct option that represents this range is "0 100 200 none of the answer choices".
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9. Given p = 2i + 2j + k and q = 4i + k. Find
(a) p • q
please help ASAP for 25 points and brainliest :)
12
Step-by-step explanation:
because i,j,k are the unit vectors of x y and z axis and the vector having same unit vector can only be multiply or divide
(x + y )(x 2 - xy + y 2 )
Answer:
\(x^3+y^3\)
Step-by-step explanation:
\((x+y)(x^2-xy+y^2)= \\\\x(x^2)+x(-xy)+x(y^2)+y(x^2)+y(-xy)+y(y^2)= \\\\x^3-x^2y+xy^2+x^2y-xy^2+y^3= \\\\\boxed{x^3+y^3}\)
Hope this helps!
Identify whether the variable in the information below is qualitative or quantitative. Government agencies carefully monitor water quality and its effect on wetlands (Reference: Environment Protection Agency Wetland Report EPA 832-R-93-005). Of particular concern is the concentration of nitrogen in water draining from fertilized lands. Too much nitrogen can kill fish and wildlife. Twenty-eight samples of water were taken at random from a lake. The nitrogen concentration (milligrams of nitrogen per liter of water) was determined for each sample.
Answer: quantitative
Step-by-step explanation:
Measured variables in statistics may be subdivided into quantitative or Qualitative variables depending on whether the variable in question is numeric or non-numeric. Variables which are designed to evaluate on the basis of Number or quantity may be termed as quantitative variables while those which measure attribute and are used for characterization are called Qualitative variables. In the scenario above, the variable is concerned with the determination of concentration of nitrogen draining into water bodies, concentration follows that numeric calculations be Made in other to determine the amount of nitrogen in milligram per Litre in a particular water body in other to prevent its effect on wildlife which could result from excessive concentration in water bodies.
Can you help please on this
Answer:
5
Step-by-step explanation:
Colleen is searching online for airline tickets. Two weeks ago, the cost to fly from Boston to Hartford was $250. Now the cost is $355. What is the percent increase? What would be the percent increase if the airline charges an additional $50 baggage fee with the new ticket price?
Answer: Increase in percentage by 42% and with baggage 43.2%.
Step-by-step explanation:
we know that the price is increased from $250 to $ 335
the percentage change by increasing the price is
$355 - $ 250 = $105
percentage change will be change/original = 105/250*100 = 42%
additional charges $ 50, $105+ $50 = 155
percentage change = 155/355*100 = 43.2%
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NO LINKS!! Please help me with the Domain and Range part 4ii
Answer:
9) D: (-4, 4]; R: [-6, -4]
10) D: [-5, -5]; R: (-7, ∞)
Step-by-step explanation:
You want the domain and range of the relations shown on the given graphs.
DomainThe domain of a relation is the set of x-values for which it is defined. An open circle indicates that point is not included in either the domain or range.
RangeThe range of a relation is the set of y-values that the relation produces. An open circle indicates the y-value at that point is not in the range.
9)The graph has an open circle at x = -4 on the left, and a solid dot at x = 4 on the right. All of the x-values between these have corresponding y-values.
The domain is (-4, 4].
The bottom (minimum) of the curve lies on the line y = -6, so that is the lowest value in the range. The relation produces all y-values between -6 and -4. The solid dot at (4, -4) means -4 is included in the range.
The range is [-6, -4].
10)The vertical line at x=-5 means -5 is the only value in the domain.
The domain is [-5, -5].
The vertical line extends upward from an open circle at y = -7. The open circle means -7 is not part of the range.
The range is (-7, ∞).
Answer:
9) Domain: (-4, 4]
Range: [-6, -4]
10) Domain: [-5]
Range: (-7, ∞)
Step-by-step explanation:
Definitions
An open circle indicates the value is not included in the interval.
A closed circle indicates the value is included in the interval.
An arrow shows that the function continues indefinitely in that direction.
Interval notation
( or ) : Use parentheses to indicate that the endpoint is excluded.
[ or ] : Use square brackets to indicate that the endpoint is included.
Domain & Range
The domain is the set of all possible input values (x-values).
The range is the set of all possible output values (y-values).
Question 9From inspection of the graph, the minimum x-value is x = -4 and the maximum x-value is x = 4.
There is an open circle at endpoint (-4, -4). Therefore, x = -4 is not included in the domain.
There is an closed circle at endpoint (4, -4). Therefore, x = 4 is included in the domain.
Therefore, the domain of the relation is restricted: (-4, 4]
From inspection of the graph, the minimum y-value is y = -6 and the maximum y-value is y = -4.
This maximum value is included in the range since there is a closed circle at (4, -4).
Therefore, the range of the relation is restricted: [-6, -4]
Question 10From inspection of the graph, the line is a vertical line at x = -5.
Therefore, the domain of the relation is restricted to x = -5: [-5]
From inspection of the graph, the minimum y-value is x = -7.
This minimum value is not included in the range since there is an open circle at (-5, -7).
There is an arrow on the other endpoint of the line, indicating that the line continues indefinitely in that direction.
Therefore, the range of the relation is restricted: (-7, ∞)
Estimate the diameter of a circle with a circumference of 80 feet
1. 12.74 feet
2. 25.48 feet
3. 40 feet
4. 50.96 feet
Answer:
2) 25.48
The diameter of the circle d = 25.48
Step-by-step explanation:
Step(i):-
we know that the diameter of a circle d = 2 r
The circumference of the circle = 2π r
Given that the circumference of the circle = 80 feet
Step(ii):-
The circumference of the circle = 2π r = 80
⇒ π (2r )= 80
⇒ πd = 80
⇒ \(d = \frac{80}{3.14}\)
d = 25.477
Final answer:-
The diameter of the circle d = 25.477
If you deposit $2000 in an account earning 3% interest compounded monthly, how much will you have in the account in 20 years?
I need help for number 3
Answer: 3/2
Step-by-step explanation: 24 ÷ 2² + 8 (3/2) = 3/2
Answer:
i think this is the ans
Step-by-step explanation:
plezz mark brainliest
Which choice is equivalent to the expression below?
√-27
OA. -3√3
OB. 3143
O C. -√√27
OD. -3√√37
OE. 3√3
The equivalent expression for the given expression is 3i√3.
What is an equivalent expression?Equivalent expressions are expressions that work the same even though they look different. If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value for the variable.
The given expression is √-27
= i√27
= i√(9×3)
= 3i√3
Therefore, the equivalent expression for the given expression is 3i√3.
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If a jar of grape jelly has a sell price of $1.25. The sale price 75% off the original price. What was the original price.
Answer:
i believe its $0.31
Step-by-step explanation:
3. The circumference of a circle is 607 cm. What is the diameter of the circle?
120 cm
30 cm
60 cm
90 cm
Answer:
the circumference is 30 cm,
Step-by-step explanation:
Hope it helps
PLS I need help!!!!!!
Find the mean, median, and mode of the data, if possible. If any of these measures cannot be found or a measure does not represent the center of the data, explain why. The cholesterol levels of a sample of 10 female employees are listed below. 130130 145145 215215 170170 165165 225225 240240 185185 130130 132132 What is the mean cholesterol level? Select the correct choice below and fill in any answer box to complete your choice. A. The mean cholesterol level is nothing. (Round to one decimal place as needed.) B. There is no mean score.
Answer:
The mean cholesterol levels
= 173873.7
Step-by-step explanation:
For The mean
The mean is going to be sum of the numbers divide by the number
Mean = (130130 +145145+ 215215 +170170+ 165165 +225225+ 240240 +185185+ 130130 +132132 )/10
Mean =1738737/10
= 173873.7
For Median
Wee arrange ascending order
130130, 130130, 132132, 145145, 165165, 170170, 185185, 215215, 225225, 240240
Median = (165165+170170)/2
Median = 335335/2
Median = 167667.5
Mode = 130130
Correct answer please
Answer:
50.75
Step-by-step explanation:
We have:
\(E[g(x)] = \int\limits^{\infty}_{-\infty} {g(x)f(x)} \, dx \\\\= \int\limits^{1}_{-\infty} {g(x)(0)} \, dx+\int\limits^{6}_{1} {g(x)\frac{2}{x} } \, dx+\int\limits^{\infty}_{6} {g(x)(0)} \, dx\\\\= \int\limits^{6}_{1} {g(x)\frac{2}{x} } \, dx\\\\=\int\limits^{6}_{1} {(4x+3)\frac{2}{x} } \, dx\\\\=\int\limits^{6}_{1} {(4x)\frac{2}{x} } \, dx + \int\limits^{6}_{1} {(3)\frac{2}{x} } \, dx\\\\=\int\limits^{6}_{1} {8} \, dx + \int\limits^{6}_{1} {\frac{6}{x} } \, dx\\\\\)
\(=8\int\limits^{6}_{1} \, dx + 6\int\limits^{6}_{1} {\frac{1}{x} } \, dx\\\\= 8[x]^{^6}_{_1} + 6 [ln(x)]^{^6}_{_1}\\\\= 8[6-1] + 6[ln(6) - ln(1)]\\\\= 8(5) + 6(ln(6))\\\\= 40 + 10.75\\\\= 50.74\)
If you are converting from a large unit to a smaller unit, will you always divide?
Explain and include an example.
If you are going from a larger unit to a smaller unit, you multiply by successively. If you are going from a smaller unit to a larger unit, you divide by successively. The factor label method can also be applied to conversions within the metric system.
When you are converting from a larger unit to a smaller unit, you will always divide.
What is unit conversion?
When you are converting from a larger unit to a smaller unit, you will always divide. This is because as you move from a larger unit to a smaller unit, you are breaking the quantity down into more individual parts, hence the need for division.
For instance, to convert 5 m to centimeters;
5 meters x (100 centimeters / 1 meter) = 500 centimeters
As you can see, we divided 5 meters by 100 (the number of centimeters in one meter) to obtain the equivalent length in centimeters, which is 500 centimeters.
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one card is drawn from a pack of 52cards each of the 52 cards being equally likely to be drawn. what is the probability that the card drawn is a king?
The probability of drawing a king from a standard deck of 52 cards is 1/13.
In a standard deck of 52 playing cards, there are four kings: the king of hearts, the king of diamonds, the king of clubs, and the king of spades.
To find the probability of drawing a king, we need to determine the ratio of favorable outcomes (drawing a king) to the total number of possible outcomes (drawing any card from the deck).
The total number of possible outcomes is 52 because there are 52 cards in the deck.
The favorable outcomes, in this case, are the four kings.
Therefore, the probability of drawing a king is given by:
Probability = (Number of favorable outcomes) / (Number of possible outcomes)
= 4 / 52
= 1 / 13
Thus, the probability of drawing a king from a standard deck of 52 cards is 1/13.
This means that out of every 13 cards drawn, on average, one of them will be a king.
It is important to note that the probability of drawing a king remains the same regardless of any previous cards that have been drawn or any other factors.
Each draw is independent, and the probability of drawing a king is constant.
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help me please
Indicate the method you would use to prove the two triangles. If no method applies, enter "none".
AAS
SSS
NONE
SAS
ASA
Based on the information given, we know that the two triangles have two pairs of congruent angles. This is sufficient to prove that the two triangles are congruent using the AAS (Angle-Angle-Side) postulate. Therefore, the method I would use to prove the two triangles congruent is **AAS**.
Can some one help pls
in a study of 225 adults the average heart rate was 72 beats per minute assume the population of heart rates is known to be approximately normal with a standard deviation of 10 beats per minute what does a margin of error of 1.1 for the 90% confidence interval of the average beats per minute mean
Answer:
There Is A 90% Chance That The Population Mean Is Between 70.9 And 73.1 Beats Per Minute. There Is A 90% Chance That The Population Mean Is Between 62 And 82 Beats Per Minute. There Is A 10% Chance That The Population Mean Is Less Than 72 Beats Per Minute
Hope it helps
Question below..............................................................
Step-by-step explanation:
dont know the answer what we have to do
Mr Ophaug erns $100 every 2 hours for tutoring kids in math after school. He is willing to tutor up to 6 Hours each week. Create a table of values for this scenario and find the rate of change
Answer:
Step-by-step explanation:
1 hour =$50
2hour=$100
3hour=$150
4hour=$200
5hour=$250
6hour=$300
rate of change is $300 a week if they work 6 hours
hope this helps, have a good day!
Eliana loves music, especially 80's punk rock. Eliana looked at the number of songs in her itunes account and she has 6 less than 4 times her best friend. Eliana's classmate David has 3 more than double her best friend. When talking to her Social Studies teacher, Eliana found out social study teacher has 7 more than two times the number of songs in his library than Eliana. Define a variable, then write and solve an equation. If the total number of songs is 382, how many songs does Eliana, her best friend, David and her social study teacher have?
Answer
Step by step explantion:
bsf= 26
Eliana:98
SS teacher=203
David=55
Step-by-step explanation:
m= music
bsf: m
eliana:4m-6
David:2m+3
SS teacher: 2(4m-6)+7
m+4m-6+2m+3+8m-12+7
382=15m-7
7+ +7
389=15m
/15m /15m
m=26
multiply 26 to each one of them
Kai and Finley were studying together for their exams the
following day. They had planned to spend the entire two days
after the exams hiking to a log cabin on the Winslow trail. The trail
was closed on Mondays, Wednesdays, and weekends.
On which day of the week was their exam scheduled?
Their exam must have been scheduled on Wednesday, allowing them to start hiking on Thursday after the exams.
How to determine which day of the week was their exam scheduledTo determine the day of the week on which Kai and Finley's exam was scheduled, we need to consider the information provided about the trail being closed on Mondays, Wednesdays, and weekends.
If they had planned to hike to the log cabin for two days after the exams, and the trail is closed on weekends, it means they cannot start hiking on Saturday or Sunday.
Since they cannot start hiking on Saturday or Sunday, the two possible options for the exam day would be Monday or Wednesday, as they have not specified whether the hike starts immediately after the exams or the day after.
However, we can conclude that their exam was not scheduled on Monday, as the trail is closed on Mondays, and they had planned to hike immediately after the exams.
Therefore, their exam must have been scheduled on Wednesday, allowing them to start hiking on Thursday after the exams.
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Please HELP!!!
Will give 15 points!!
For a test that’s due today!!
Answer:
A
Step-by-step explanation:
For a right triangle
\(A=\frac{ab}{2} \\\frac{(10.4)(15.3)}{2} =79.56\)
This is the same as the other triangle because they are the same size because of congruency
Area of the rectangle
\(a^2+b^2=c^2\\\)
\(\sqrt{(10.4^2+15.3^2} =c\)
\(c= 18.5\)
18.5 x 7 = 129.5
Add them all up
129.5+79.56+79.56= 288.62
which function is best represented by this graph
Answer:
Step-by-step explanation:
e
From 39 seconds to 13 seconds
Answer:
26 seconds
Step-by-step explanation:
39 - 13 = 26
Which sequence of transformations takes ^A to its image, ^B?
A. re
ection over the x-axis and translation 2 units down
B. re
ection over the y-axis and translation 2 units down
C. translation 2 units down and 90
rotation about the origin
D. translation 12 units right and 90
rotation about the origin
Answer:
translation 2 units down and 90
rotation about the origin
Step-by-step explanation:
find the area of the surface formed by revolving the polar equation over the given interval about the given line. polar equation interval axis of revolution r
The area of the surface formed by revolving the polar equation over the given interval about the given line , r = 4cosθ is 16π .
What is Polar co-ordinate System ?Polar coordinate system is a two dimensional coordinates system like Cartesian system with the variables r, θ ( polar coordinates) and axis called polar axis . Consider the polar equation
r = 4cosθ --(1) ; 0≤θ ≤π/2
The axis of a rotation is in polar axis.
We know that, the surface area about θ = π/2 is
S = 2π ∫(r sinθ√(r² + (dr/dθ)²) dθ with limits
so, differenatiate equation (1) with respect to θ we get , dr/dθ = - 4 sinθ
Now, S =2π₀∫ˣ [4cosθsinθ√(4²cos²θ + (-4 sinθ)²)]dθ where x = π/2
S = 2π ₀∫ˣ[ 4cosθsinθ√(4²cos²θ + 4²sin²θ)]dθ
S = 2π₀∫ˣ [ 4cosθsinθ√4²(cos²θ+sin²θ)]dθ
S = 2π ₀∫ˣ [ 16cosθsinθ√(cos²θ+sin²θ)]dθ
S = 32π ₀∫ˣ [cosθ sinθ √1 ]dθ
S = (32π/2) ₀∫ˣ 2cosθsinθdθ
S = (16π) ₀∫ˣ sin2θdθ
S = 16π ₀[- cos2θ/2]ˣ
putting the upper limit θ = x = π/2 and lower limit θ = 0
S = (- 16π/2) [ cos2 (π/2) - cos2(0)]
S = (- 8π )[ cosπ - cos0° ] = - 8π[ - 1 - 1]
S = 16π
Hence, surface area is 16π .
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Complete question :
Find the area of the surface formed by revolving the polar equation over the given interval about the given line_ Polar Equation r = 2 cosQ
Interval 0 < Q <π/ 2 Axis of Revolution Polar axis.