Please help me its a math question

Me. drysdale earned 906.25 in interest in one year on money that he had deposited in his local bank if the bank paid an interest rate of 6.25% how much money did mr. drysdale deposit

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Write the equation in logarithmic form m^x=n