Barry took out a 20-year loan for $55,000 at an apr of 6.8%, compounded monthly, and he is making monthly payments of $419.84. assuming that his balance is $31,019.97 with 8 years left on the loan, how much would he save by paying off the loan 8 years early?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.