1 year ago

PLEASE HELP ME PLS ITS MATH

Mathematics

1 answer:

Ganezh [65]1 year ago

7 0

Answer:

Step-by-step 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.

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