Answer
$t=1$ $$P= 1,037ft$$
$t=8$ $$P= 29ft$$
Work Step by Step
We have $$P(t) = -16t^2+1053$$
When $t=1$ $$P=-16(1)^2+1053 = 1037ft$$
When $t=8$ $$P=-16(8)^2+1053 = 29ft$$
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