An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. The distance from the top edge of the archery target to the ground is 1.5 meters. http://i.imgur.com/Vu7Ko.png?1

I know this has been asked before, but none of the answers are helpful, I can't figure this out.

Question

An archer releases an arrow from a shoulder height of 1.39 m. When  the arrow hits the target 18 m away, it hits point A. When the target is  removed, the arrow lands 45 m away. Find the maximum height of the  arrow along its parabolic path. The distance from the top edge of the archery target to the ground is 1.5 meters. http://i.imgur.com/Vu7Ko.png?1

I know this has been asked before, but none of the answers are helpful, I can't figure this out.

phi · Answer

You need to know the height A above the ground to do this problem.

anonymous · Answer

it's 1.26 meters

phi · Answer

I did this problem a while ago.

anonymous · Answer

I'm supposed to do it using a quadratic equation, not physiscs. This is algebra 2

anonymous · Answer

The way you did it is too complicated, I haven't learned any of that, I believe there is an easier way.