Please help i have to get this all done by tommorw

What is the solution of log2  (3x  -  7)  =  3? 4 5

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 measure of angle c in the following triangle.