1. Warm Up 1.What is the circumference of a circle with a radius of 4.2 cm? 2.If the circumference of a circle is 25.12 mm, what is the radius of the circle? 3.What is the cross section of a triangular prism, parallel to its base? 4.What is the area?

2. Homework Check

3. SEMESTER 1 INTERIM REVIEW

4. 1. Elizabeth wants to determine the probability that she will be elected student body class president. She surveyed a random sample of 25 students. Based on this data, she has a 36% chance of being elected. Now she wants to determine how accurate this probability may be. Which of the following would be the best method for her to do this? A) Ask the same 25 students she originally surveyed to make sure they are convinced of their choices. B) Survey several more random samples of 25 students. C) Survey several more random samples of any size. D) Recheck her math on the first survey for accuracy.

5. 2. Sam conducted a survey to determine the favorite flavor of ice cream in his hometown. Fifteen of the fifty people he surveyed liked strawberry best. How many of the 3,500 residents in the town would you expect to like strawberry best? A) 150 B) 560 C) 750 D) 1,050

6. 3. Rosa conducted a survey of students' favorite types of music. The results are shown in the table. Of the 550 students in the whole school, how many would you expect to prefer Pop/Rock? A) 132 B) 154 C) 264 D) 396

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9. MAD 6. Calculate the mean absolute deviation of the following data set. 60, 75, 75, 80, 90, 100 A) MAD = 5 B) MAD = 6 C) MAD = 8 D) MAD = 10

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11. 8. Student B is more consistent, with a MAD = 3.44.

12. 9. From left to right on the number line, order the events based on how likely they are occur. a. The event is certain to happen. b. The event is just as likely to happen as not to happen. c. The even has no chance of happening. d. The event could happen but is unlikely. e. The event is likely to happen. A) d, c, b, a, e B) a, e, b, d, c C) d, c, b, e, a D) c, d, b, e, a

13. 10. Cassie rolls a fair number cube with 6 faces labeled 1 through 6. She rolls the number cube 300 times. Which result is most likely? A) Cassie will roll a 1 or a 2 about 50 times. B) Cassie will roll a 1 or a 2 exactly 50 times. C) Cassie will roll an even number about 150 times. D) Cassie will roll an even number exactly 150 times.

14. 11. A group is given a spinner with 8 sections labeled with 4 colors ( 3 red, 1 blue, 2 green, 2 yellow). The group is asked to find the probability of spinning the spinner and landing on red. The theoretical probability of landing on red is 3/8. If the groups spins the spinner a total of 50 times, how many times could they expect to land on red? A) About 3 B) About 8 C) About 19 D) About 38

15. 12. Emma knows that there is a 50% chance of landing on heads when she tosses a coin. She decided to conduct her own experiment and tossed a coin 40 times. She landed on heads 30 times instead of the expected 20. What could be a reason for this difference? A) She miscounted the number of heads. B) She needs to conduct more trials. C) She needs to use a different coin. D) She got 30 and that is close enough.

20. 17. At a deli, you have a choice of turkey, roast beef, or ham on your sandwich and a choice of potato chips or corn chips on the side. How many different ways can you order a sandwich and chips? A) 5 ways B) 6 ways C) 8 ways D) 9 ways

21. Workbook Workbook p. 175 #1, 3, 5, and 7. Check your answers in the back as you work each problem.