Jin li's parents deposit $2,000 in a college savings account. the account pays an interest of 4% compounded annually. what would the total (new principal) be at the end of year 9?

This can be described by the exponential equation y = 2000 x 1.04(to the xth power), in which x is the number of years passed.
thus, we put in 9 for x.
y = 2000 x 1.04^9
1.04^9 = about 1.42
2000 x 1.42 = $2840 :)

Google it that might work