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After being dropped a ball always bounces back to 2/7 of the height of its previous bounce. After the first bounce it reaches a height of 290 inches. How high will it
reach on bounce number 4?

A. 0.97 inches

B. 1.93 inches

C. 6.76 inches

D. 13.53 inches

Explanation:

This problem is a series of multiplications by 2/7:
290 inches × 2/7 × 2/7 × 2/7 = 290×2×2×2/7×7×7 = 2320/343 = 6.76 inches

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