solving a word problem using a quadratic equation with irrational roots

A ball is thrown from an initial height of

meters with an initial upward velocity of

15/ms

. The ball’s height

(in meters) after

seconds is given by the following.

h=2+15t-5t^2

Find all values of

for which the ball’s height is

meters.

Round your answer(s) to the nearest hundredth

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