http://i.imgur.com/kPBi5Ueh.jpg

#15

I am not good at creating equations off of word problems... I try but I always get it wrong, I'm not sure how to do any word problems like these.

275x^2 - 15x - 19600 = 0

That equation was my attempt at it, not sure if it is correct...

Any help would be great, thanks!