A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y= -0.04x^2 + 8.3x + 4.3, 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 hundredth meter.

A: 208.02m
B: 416.03m
C: 0.52m
D: 208.19m

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= -0.04x^2 + 8.3x + 4.3, 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 hundredth  meter. 

A: 208.02m
B: 416.03m
C: 0.52m
D: 208.19m

jdoe0001 · Answer

have you covered factoring quadratics yet?

jdoe0001 · Answer

|dw:1427323698165:dw| 

it lands on the ground, at that point
notice "y" value at that point

set it so, and solve for "x", or horizontal distance