The path of a golf ball can be modeled by the quadratic equation y=-0.001x^2+0.3x, where y represents the vertical distance and x represents the horizontal distance that the ball has traveled in yards. How far does the ball travel before it hits the ground?

Question

anonymous · Answer

@timo86m

campbell_st · Answer

set the equation to zero and solve for x

$$0 = -16t^2 + 400$$

anonymous · Answer

wait the equation is wrong $$y=-0.001x ^{2}+0.3x$$

campbell_st · Answer

the ball hits the ground when the vertical height is zero so you are solving

$$0 = -0.001x^2 + 0.3x$$

solve for x...

campbell_st · Answer

or if you like solve 

$$0.001x^2 = 0.3x$$

divide both sides by x

$$0.001x = 0.3$$

anonymous · Answer

oh ok so that would make it 300 yards?

anonymous · Answer

@primeralph

primeralph · Answer

Yeah?

anonymous · Answer

can you help? and I see you brought your picture back lol

anonymous · Answer

@thomaster

primeralph · Answer

You've already been supplied with the answer pretty much.

anonymous · Answer

ok thanks

anonymous · Answer

set y=0 and solve for x :)