If i have the circumference of a circle how do i find the radius

What is the binomial expansion of (2x-3)^5

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.

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5