Catching up in savings
Judy enters $3000 into a savings account and decides to put $125 in the account each month after that. The account earns 2.6% interest each year.
Five years later, her younger sister Sally places $5000 into a savings account and puts $150 in the account each month after that. Her account earns 4.6% interest each year.
How many years will it take until Sally has as much money in her account as Judy does in hers?
Assume the interest rates remain constant.
Submit your idea for an investigation to InterMath.
