Which one represents the equation log3 81 = 4 in exponential form?

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.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,