Aball is thrown from the top row of seats in a stadium. the function h(t) = –16t2 + 16t + 96 gives the height, h, in feet, of the ball t seconds after it is thrown. how long will it be before the ball hits the ground?

The ball will hit the floor after 3 seconds.

The given equation is,

Height,

By dividing the above equation by "16", we get

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By factorizing, we get

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Time can't be negative. Thus the above answer i.e., 3 is correct.

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  3 seconds

Step-by-step explanation:

We assume the ground is where h=0, so the equation we need to solve is ...

  0 = -16t^2 +16t +96

Dividing by -16 gives ...

  0 = t^2 -t -6

Factoring, we get ...

  0 = (t -3)(t +2)

This has solutions t=3 and t=-2. Since we know the ball won't land 2 seconds before it is thrown, the solution is ...

  It will be 3 seconds before the ball hits the ground.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

i do not know this sorry : (