What is the new angle at the bottom left side of the door?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Which is the focus of a parabola with equation y2=4x

Which one is the correct answer, and why?