Question

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = -0.06x^2 + 9.6x + 5.4 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground.
how far horizontally from its starting point will the rocket land? round your answer to the nearest hundred.

the answers are
A 4.30m
B 160.56m
C 161.12m
D 13.94m\

i posted this again because i forgot to put the actual question..oops

Answer 1

it lands when y = 0

0 = -0.06 x^2 + 9.6 x + 5.4 ... use the quadratic formula to find x
... you want the larger positive value

Answer 2

so would the answer be b? or a?

Answer 3

i think b