Question

A rock is thrown from one side of a river to another. The function h(t) = −16t2 + 80t + 30 gives the height in inches of the rock t seconds after it has been thrown.Find h(2.5) .

Answer 1

To find h(2.5), we need to plug t = 2.5 into the function h(t) and calculate the result.

h(2.5) = -16(2.5)^2 + 80(2.5) + 30
h(2.5) = -16(6.25) + 200 + 30
h(2.5) = -100 + 230
h(2.5) = 130

Therefore, h(2.5) = 130 inches.