h(t)=-5t^2+27t+18

Question

A potato is launched from a cannon and its height after t seconds is modeled by the function.

h(t)=-5t^2+27t+18

How many seconds does it take for the potato to hit the ground?

Answer 1

h(t) = -5t² + 27t + 18 = 0; t = (27 ± √729 + 360)/10 = (27 ± 33)/10 = 6 s

Answer 2

0 = -5t² + 27t + 18

Can you solve for t and answer?