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PLEASE HELP ME PLS ITS MATH

PLEASE HELP ME PLS ITS MATH-example-1
User Ecksters
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1 Answer

6 votes

Answer:

9

Explanation:

We know that


h(t)=-16t^2+1296

The balls hits the ground when h(t)=0, so


-16t^2 + 1296=0 \\ \\ t^2 - 81=0 \\ \\ t^2 = 81 \\ \\ t=9

Note I only considered the positive case because time must be positive.

User Christa
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