alg2

suppose you drop a tennis ball from a height of 15 feet. After the ball hits the floor, it rebounds to 85% of its previous height. How high will the ball rebound after its third bounce. round to the nearest tenth.. my teacher told be the answers 9.2 but i don't know how she got it

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  1. .85*.85*.85 * 15 = .85^3 * 15 = 9.21

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  2. tn= ar^n-1
    t3=15(.85)^4-1
    t3=15(.85)^3
    t3=9.2

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