The equation is f(x)=x^2-3x+4

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Someone answer this check out the image!

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.