Help me with this pleast im confused

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.

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250