The birth rate b of multiple births as a function of age a is given by the function b (a) = 1.73a - 14.56 for 15 < or equal to 15 < or equal to 44

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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.

Write the expression as a single natural logarithm. 2 in a - 4 in y