Can somebody answer this and explain?

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.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.