$480 invested at 14% compounded quarterly after a period of 6 years

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.