PLEASE HELP WITH 12, 13 & 15 15. Using the circle below, find each arc length. Round to the nearest hundredth.
R
a) ST
b) RPT
0
970
P
S
X
7
125
PS = 28 feet

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 me out here number 4 plz

3.4a=57.8 what is the the value of a