AnswersAZ-College Prep Math BUnit Test

Unit Test — Cumulative exam Answers

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Which of the following best describes how the y values are changing over each interval?xy122438416532

A
They are increasing by 2 each time.
B
They are increasing by 4 each time.
C
They are being multiplied by 2 each time.
D
They are being multiplied by 4 each time.
42
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The cooler at a picnic contained 4 apple juice boxes, 8 orange juice boxes, and 6 fruit punch juice boxes. A juice box is selected at random. What is the probability of the complement of choosing an orange juice box?

A
StartFraction 1 over 18 EndFraction
Option A
B
StartFraction 4 over 9 EndFraction
Option B
C
StartFraction 5 over 9 EndFraction
Option C
D
StartFraction 17 over 18 EndFraction
Option D
43

Keisha has a bag that contains one red marble (r), one yellow marble (y), one green marble (g), and one orange marble (o). She makes the table below to show the different ways that she can choose two marbles—by first choosing one marble, replacing it, and then choosing another marble.What outcome is missing from Keisha’s table?

Question illustration
A
yg
B
yo
C
yr
D
yy
44

Over which interval are the exponential and linear function approximately the same?

Question illustration
A
from 0.25 to 0.5
B
from 0.5 to 0.75
C
from 0.75 to 1.0
D
from 1.25 to 1.5
45

Which is a statistical question that you can ask to learn about your classmates’ favorite movie?

A
What is your favorite movie?
B
What is Mr. Maddox’s favorite movie?
C
How many students like The Lord of the Rings as their favorite movie?
D
How many students own the movie The Lord of the Rings?
46

A data set has a median of 12, an upper quartile of 15, a lower quartile of 10, a minimum of 4, and a maximum of 20. Which statement is true of the box plot of this data set?

A
The box will go from 10 to 12.
B
A line dividing the box will be at 12.
C
The left whisker will go from 4 to 15.
D
The right whisker will go from 12 to 20.
47

An exponential growth function has an asymptote of y = –3. Which might have occurred in the original function to permit the range to include negative numbers?

A
A whole number constant could have been added to the exponential expression.
B
A whole number constant could have been subtracted from the exponential expression.
C
A whole number constant could have been added to the exponent.
D
A whole number constant could have been subtracted from the exponent.
48

What is the value of i 20+1?

A
1
B
–1
C
–i
D
i
49

Juanita has a storage closet at her shop with extra bottles of lotion and shower gel. Some are scented and some are unscented. If she reaches into the closet and grabs a bottle without looking, she has a 42% chance of grabbing a bottle of shower gel.For the events "shower gel” and "scented” to be independent, what must be shown to be true?

A
P(lotion) = 42%
B
P(scented) = 42%
C
P(shower gel | scented) = 42%
D
P(scented | shower gel) = 42%
50

Jayce volunteers for the local library. The librarian wants to find out whether the patrons prefer paperback books or e-books. Jayce cannot decide which method to use for polling the patrons.Option 1: Poll every fifth patron who enters the library on Paperback Lovers Day.Option 2: Poll every third patron who enters the library on Technology Appreciation Day.Which statement about the methods of collecting data is true?

A
Jayce should not use either option. Option 1 is likely to be biased so that paperbacks are overrepresented, while Option 2 is likely to be biased so that e-books are overrepresented.
B
Jayce should use Option 2. Option 1 is biased so that paperbacks are overrepresented, but Option 2 will give balanced results that reflect the general population.
C
Jayce should use Option 1. Option 2 is biased so that e-books are overrepresented, but Option 1 will give balanced results that reflect the general population.
D
Jayce should use whichever one is most convenient for those taking the polls because both options will give balanced results that reflect the general population.
51

Melanie invests $4,000 into an account offering 4% interest compounded annually. Gina invests $4,000 into a simple interest savings account offering a 4.5% interest rate. What is the dollar amount of the greater balance at the end of five years? Round to the nearest dollar. Use the formula for compound interest; Use the formula for simple interest. [BLANK]

Question illustration
Answer not available
52

Jamaal knows that it is certain that he will win the election because he is the only person who is running for class treasurer. Which value represents the probability that he will win the election?

A
0
B
One-fourth
Option B
C
Three-fourths
Option C
D
1
53

A prize bag contains four country music CDs, eight pop music CDs, and five classic rock CDs.What is the probability of pulling out a classic rock CD and then, without replacing it, pulling out a country music CD? Express your answer in decimal form, rounded to the nearest hundredth.

A
0.03
B
0.07
C
0.15
D
0.18
54

A jar contains only one blue tile, one green tile, one red tile, and one yellow tile. If a tile is chosen at random and then replaced in the jar, and then a second tile is chosen at random, how many of the possible outcomes contain at least one red tile?

A
1
B
2
C
4
D
7
55

A group of 120 people were asked whether their income level is above or below $25,000 and whether they subscribe to a movie channel. The data from the survey is shown in the Venn diagram. Use the Venn diagram to find the missing values in the frequency table.

Question illustration
A
a = 18, b = 34, c = 65
B
a = 34, b = 18, c = 68
C
a = 34, b = 68, c = 47
D
a = 47, b = 18, c = 68
56

What are the x-intercepts of the graph of the function f(x) = x2 + 5x − 36?

(
(−4, 0) and (9, 0)
(
(4, 0) and (−9, 0)
(
(−3, 0) and (12, 0)
(
(3, 0) and (−12, 0)

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