Height of a projectile if a rocket is fired vertically into the air with a speed of 240 feet per second, its height at timet seconds is given by h(t) = -16+ 240t. at what time(s) will the rocket be the following number of feet above the ground? a. 704 feetb. 896 feetc. why do parts a and b each have two answers? d. how long will the rocket be in the air? (hint: how high is it when it hits the ground? )e. when the equation for part d is solved, one of the answers is t = 0 second. what does this represent?