Posted by rr on .
A launched rocket has an altitude, in meters,give n by the polynomial h+vt4.9t^2, where h is the height, in meters, from which the rocket is airborne. If a rocket is launched from the top of the tower 90 meters high with an initial upward speed of 50 meters per second, what will its height be after 2 seconds.

algebra 
Reiny,
height = 4.9t^2 + 50t + 90
sub in t=2, and evaluate