Question

The height, in meters, above sea level of a NASA launched rocket is given by h(t)=-4.9t^2+223t+115 where t represents the number of seconds since the rocket was launched.

Answer 1

ok

Answer 2

I forgot to put the rest sorry Assuming that the rocket will splash down into the ocean, after how many seconds will the splashdown occur?
How many meters above sea level does the rocket get at its peak?

Answer 3

notice the leading coefficient in the parabola equation is negative, that is, -4.9
thus the parabola opens DOWNWARD, so