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#1 2015-04-20 07:06:59
Fourth Bounce:
Question:
After being dropped a certain ball always bounces back to 2/5 of the height of its previous bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) will it reach after its fourth bounce?
Option A):
8
Option B):
20
Option C):
5
Option D):
15
Correct Answer is Option A):
8
Explanation:
If after each bounce it reaches 2/5 of the previous height, then after the second bounce it will reach 2/5 x 125. After the third it will reach 2/5 x 2/5 x 125. After the fourth it will reach 2/5 x 2/5 x 2/5 x 125. This cancels down to 2 x 2 x 2 = 8
Failure is the first step towards seccess.
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2015-04-20 07:06:59
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