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Piecewise Defined Functions — Cumulative exam Answers

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Four girls and six boys are in a Spanish club. Three of the people will be chosen at random to represent the group in a photograph.What is the probability that one girl and two boys will be chosen?

A
40%
B
50%
C
60%
D
70%
22
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A survey was taken of children between the ages of 10 and 17 about how many siblings they have and whether they have a pet. The results of the survey are shown in the table.

Question illustration
A
Out of the 125 children who do not have a pet, 18 of them have 2 siblings.
B
Out of the 97 children who have 1 pet, 40 of them do not have any siblings.
C
Out of the 125 children who do not have any siblings, 34 of them have a pet.
D
Out of the 97 children who have 1 sibling, 40 of them do not have a pet.
23

A student collected data on the size of coffee chosen by customers at a convenience store, and whether the customers took their coffee with sugar, cream, or both. Size of Coffee SmallMediumLargeTotalCoffee AdditiveCream8152144Sugar481123Both15234280 Total274674147What percentage of customers chose a medium-sized coffee?

A
31.3%
B
32.6%
C
50.3%
D
62.1%
24

Wayne measured the width of a marker tip as 0.012 cm. What is the margin of error?

A
0.007 to 0.017
B
0.011 to 0.013
C
0.0115 to 0.0125
D
0.0125 to 0.0135
25

The resting heart rates for a sample of 15 students are recorded in the following stemplot.

Question illustration
A
66.0 beats per minute
B
69.0 beats per minute
C
69.9 beats per minute
D
70.0 beats per minute

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