A launched rocket has an altitude, in meters, given by the polynomial h+vt-4.9t^2, where h is the height, in m?

A launched rocket has an altitude, in meters, given by the polynomial h+vt-4.9t^2, where h is the height, in meters, from which the launch occurs, at velocity v in meters per second, and t is the number of seconds for which the rocket is airborne. If a rocket is launched from the top of a tower 130 meters high with an initial upward speed of 30 meters per second, what will its height be after 4 seconds?