Question 1031386
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Use the function h(t)=−16t2+v0*t+s to answer the question.

A man is standing on a cliff above a beach. He throws a rock upward at a speed of 90 feet per second from a height 120 feet above the beach. How long will it take until the rock lands on the​ beach? 

The rock will land on the beach in? 
​(Round to the nearest tenth as​ needed.)
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Substitute  v0 = 90  and  s = 120  into the function h(t)  and solve an equation 

{{{-16*t^2 + 90*t + 120}}} = {{{0}}}.

Use the quadratic formula.
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