# 110th Problem 2016

Algebra Level pending

An improvised rocket is launched from the top of a building $$150 \text{ feet}$$ high. The height$$\text{ (H) }$$reached by the rocket after$$\text{ (t) }$$seconds is given by the function:

$\large H( t ) =40t-10{ t }^{ 2 }$

How long (in seconds) did it take to reach the highest point?

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