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What number is 86% of 50Alexandra puts 3,000.00 into an account to use for school expenses. The account earns 9% interest, compounded annually. How much will be in the account after 7 years?Maggie opened a savings account and deposited 1,000.00 as principal. The account earns 5% interest, compounded annually. What is the balance after 5 years?The chu vi of a circle is 3pi kilometers. What is the radius?Jenna put 4,000 in a retirement account that offers 7% interest compounded annually. She makes no additional deposits or withdrawals. How much interest will she have earned at the end of 5 years?