Bill paid $800 simple interest on a 4% loan over 5 years for a new car. what was the original amount he borrowed.

Me. i can't figure out this question. give an explanation too. .

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost