Need help with this easy math problem

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie