Please help due today!

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Jim had 15 minutes to do 5 laps around his school what would his time be