math

11.

12. The width w of a rectangular swimming pool is 7x2. The area A of the pool is 7x3 – 42x2. What is an expression for the length of the pool? Show your work.

Determine whether each question is biased. Explain your answer.

13. A questionnaire about movie preferences asks if you would rather watch a boring documentary or an exciting action movie?

14. A beverage company conducts a survey in the lobby of a health club to determine people’s favorite beverage.

As cars passed a checkpoint, the following speeds were clocked and recorded.

Speed (mph): 55 62 61 54 68 72 59 61 70

15. Find the mean and the range of the data set. Show your work.

16. What are the minimum, first quartile, median, third quartile, and maximum of the data set? Show your work.

17. The two box-and-whisker plots below show the scores on a math exam for two classes. What 2 things do the interquartile ranges tell you about the two classes?

Find the value of each expression. Show your work.

18. 9P3

19. 10C4

20. There are 15 members of the show choir. In how many ways can you arrange 4 members in the front row when order does not matter?

5

5

4

5

n

7

(

1

4

3

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+

2

2

2

3

1

+

1

n

n

n

n

n

-

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60708090Class A

60708090Class B