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.

Answers

  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.

    Reply
  2. Answer:
    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.
    Step-by-step 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

    Reply

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