Van travels over the hill described by y=(-1.5(1/1000)x^2 + 15)ft

[nvn]

Always maintain four significant digits throughout all your intermediate calculations, then round only the final answer to three significant digits, unless the first significant digit of the final answer is 1, in which case round the final answer to four significant digits. You rounded your angle value too much. Try that one more time.

 

[vanquish]

I'll keep that in mind, but it accepted the answer. Thanks for sticking with me, I can be slow sometimes, I really appreciate it and I do think I learned from this, which is always a good thing.

 

[nvn]

Nice work, vanquish. The correct answer is ax = -2.42 ft/s^2, and ay = -16.14 ft/s^2. You were close in your numeric values. And you have the correct signs. But your units are currently incorrect. They did that on http://en.wikipedia.org/wiki/Mars_Climate_Orbiter#The_metric.2Fimperial_mix-up" and lost 328 million USD in a matter of minutes, when it crashed into Mars.