A model rocket is launched from the deck in Jim's backyard and the path followed by the rocket can be modelled by the relation h=-5r2+100r+15, where h, in meters, is the height that the model rocket reaches after 1 seconds. a) what is the height of the deck?
b) what is the height of the model rocket after 2 s?
c) what is the maximum height reached by the model rocket?
d) how long did the model rocket take to reach its height?
e) how long was the model rocket above 200m, to the nearest second?
f) Estimate how long the model rocket was in the air