A helicopter is flying along a path given by y = 120 - .015x^2, such that Vx = 16 m/s.

Find Y at x-54m which I found at 76.26 m.

Then it says find Vy at x=54m.

I did the derivative dy/dt = -.03x where X is 54, and I get an answer of -1.62, but the answer is suppose to be Vy = -25.92.

What am I doing wrong here??

HELP

Thanks

Joanne