Holly opened a savings account at a local bank. she deposited $1,400.00 into the account 8 years ago. if the account earns an annual simple interest rate of 4.7%, how much interest has she earned?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.