What is the area of a triangle with base=x, h= 4, side= 13

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

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.

Can someone answer this question for me