Average of three numbers is 15. What is the sum of three numbers

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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.

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?