Question

A racecar driver is trying to decrease her lap times by at least 8%. Select whether the description stated shows that the driver reached her goal.

A.The original time was 2.5 minutes, and the new time is 2 minutes.
B.The original time was 4 minutes, and the new time is 3 minutes.
C. The original time was 5.25 minutes, and the new time is 5 minutes
D. The original time was 3 minutes, and the new time is 3.15 minutes.

Answer 1

A and B

For A, 8% of 2.5 is 0.2 and 2.5 - 0.2 =2.3
2 minutes is less than 2.3 so thats correct.

For B, 8% of 4 is 0.32 and 4 - 0.32 = 3.68
3 minutes is less than 3.68 so thats correct.

Answer 2

A. The original time was 2.5 minutes, and the new time is 2 minutes.

B. The original time was 4 minutes, and the new time is 3 minutes.

Explanation:

A. 8% of 2.5 is 0.2, but 2 minutes is faster than 2.2 minutes

B. 8% of 4 is 0.32, but 3 minutes is faster than 3.68 minutes

C. 8% of 5.25 is 0.42, 5 minutes is slower than 4.83 minutes

D. she is slower so her lap time is increasing