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Isabella opened a savings account 2 years ago. The account earns 5% interest, compounded quarterly. If the current balance is 400.00, how much did she deposit initially?Find the time required for an investment of 5000 dollars to grow to 8600 dollars at an interest rate of 7.5 percent per year, compounded quarterly.Your answer is t=Ann and Tom want to establish a fund for their grandson's college education. What lump sum must they deposit at a 12% annual interest rate, compounded annually, in ordem to have 60,000 in the fund at the end of 15 years?Marian invests 8,235.98 in a savings account with a fixed annual interest rate of 6.14 % compounded continuously. What will the account balance be after 15 years?find the slae price of a 36 item after a 50% discount