I ned help please 1st picture is part a second picture is part b

Find the value of the variable and the length of each secant segment.

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.

The tile along the edge of a triangular community pool needs to be replaced? ?