Please help me?..

Question

Please help me?..

anonymous · Answer

Landon is standing in a hole that is 6.5 m deep. he throws a rock, and it goes up into the air, out of the hole, and then lands on the ground above. The path of the rock can be modeled by the equation y=-0.05x^2+4.5x-6.5, where x is the horizontal distance of the rock, in meters, from landon and y is the height, in meters, of the rock above the ground. How far horizontally from landon will the rock land? Round your answer to the nearest hundredth of a meter.

anonymous · Answer

a. 18.07 m
b. 35.96 m
c. 9.04 m
d. 71.93 m

rajat97 · Answer

put the value of y=6.5 and then solve the quadratic equation
so you may get the answer

phi · Answer

when the rock is out of the hole, and on the ground, it will be at a height of 0

solve the equation
-0.05x^2+4.5x-6.5=0

can you do that ?  (one way is use the quadratic formula)

anonymous · Answer

yes let me try

phi · Answer

There is a fly in the ointment here!  None of your choices a-d  matches the solutions to 
-0.05x^2+4.5x-6.5=0

anonymous · Answer

it says we can round to the nearest hundredth meter

phi · Answer

But I am getting 88.53 meters which is not very close to any of your choices.

anonymous · Answer

Maybe we did something wrong..