Sally’s parents deposited $15,000 into a college savings account on her third birthday. The account had an interest rate of 9.6% compounded annually. They were hoping that the money would double twice by the time she was 18 years old. Using the rule of 72, will their hopes come true?

Jaina and Tomas compare their compound interest accounts to see how much they will have in the accounts after three years. They substitute their values shown below into the compound interest formula.Compound Interest AccountsNamePrincipalInterest RateNumber of YearsCompoundedJaina$3007%3Once a yearTomas$4004%3Once a yearWhich pair of equations would correctly calculate their compound interests?





Uta invests $345 into a simple interest investment account that pays interest at a rate of 9% a year. After several years, she withdraws her balance of $531.30. Using the formula , how many years was her money invested?

Herky and Elaina want to compare their investment accounts to see how much they will have in the accounts after eight years. They substitute their values shown below into the compound interest formula.Compound Interest AccountsNamePrincipalInterest RateNumber of YearsCompoundedHerky$5005%8Once a yearElaina$4006%8Once a yearWhich pair of equations would correctly calculate their compound interests?





Uta invests an amount into a compound interest investment account that pays 6% a year. After six years, she withdraws her total balance of $500. Using the formula , how much money did Uta initially invest?

Veronique and Lily compare their investment accounts to see how much they will have in the accounts after seven years. They substitute their values shown below into the compound interest formula.Compound Interest AccountsNamePrincipalInterest RateNumber of YearsCompoundedVeronique$1,0005%7Once a yearLily$1,8009%7Once a yearWhich pair of equations would correctly calculate their compound interests?





Sylvia invested $500 in an account compounded annually with an interest rate of 8%. Manuel invested $600 in an account with a compound interest rate of 7.25%. Using the rule of 72, , who will double their money first?

Which descriptions about simple interest and yearly compounded interest are true? Select four options.
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