Answer
284 feet
Work Step by Step
We are given that the height of a projectile at any time t can be described by the polynomial function $P(t)=-16t^{2}+300t$.
In order to find the height at $t=1$ second, we can calculate th value of $P(1)$.
$P(1)=-16(1^{2})+300(1)=-16(1)+300=-16+300=284$ feet
