Chelsea deposits $600 into a bank account and is earning simple interest from the bank. After 4 years, her account has a balance of $621.60. If Chelsea decided to put $1,250.00 into the bank instead o

Chelsea deposits $600 into a bank account and is earning simple interest from the bank. After 4 years, her account has a balance of $621.60. If Chelsea decided to put $1,250.00 into the bank instead of $600, how much would she have after 7 years? Explain