Acoach wants to see how long the members of the swim team can hold their breath. he times each member and finds that the average is 53 seconds. what type of study is this?

This type of study based on observations is called observational study.

This question is based on observational study as the coach is observing each candidate's performance in their natural state. He collects the information and then finds the average time or reaches to a conclusion. Hence, its an observational study.

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation: