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September 21, 2014

Homework Help: math

Posted by melissa on Monday, May 16, 2011 at 4:42pm.

really need help, i have no idea how to answer this question !

A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds

a) how high above the water is the cliff ( The maximum height is relative to water level )

b) what is the ' second zero' and what does it mean

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