A water fountain jet shoots short spurts of water over a walkway. The water spurts reach a maximum height, then come down into a pond of water on the other side of the walkway. The height above the jet, h, of a spurt of water t seconds after leaving the jet can be found by the function h(t)equalsminus16tsquaredplus16t. Find the time it takes for the spurt of water to return to the jet's height; that is, when h(t)equals0.

The spurt of water takes 1 second to return to the jet's height.

Explanation:

The height above the jet, h, of a spurt of water t seconds after leaving the jet can be given by the function as follows :

.......(1)

We need to find the time it takes for the spurt of water to return to the jet's height i.e. when h(t) = 0

Equation (1) becomes :

So, the spurt of water takes 1 second to return to the jet's height.

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