George's bank account earns 2% interest each year. For 2 years, George does not add any money to the account or take any money out of the account. After 2 years, George has $2,601 in his bank account. How much money was in his bank account two years ago.

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.

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