Solve the problem.
-A bicycle wheel rotates 400 times in a minute as long as the rider is pedalling. If the rider stops pedalling, the wheel starts to slow down. Each minute it will rotate only $3 / 4$ as many times as in the preceding minute. How many times will the wheel rotate in the 4 th minute after the rider's feet leave the pedals? Round your answer to the nearest unit.
A) 169 times
B) 6 times
C) 0 times
D) 127 times

Question

Quizplus · Accepted Answer

The wheel's rotations decrease to $3/4$ of the previous minute's rotations each minute after pedaling stops. In the 4th minute, the rotations are $400 \times \left(\frac{3}{4}\right)^3 \approx 127$ times.

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