How do you solve this

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

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 74 round to the nearest ten