Scarlett earned some money doing odd jobs last summer and put it in a savings account that
earns 13% interest compounded quarterly. After 3 years, there is $100.00 in the account.
How much did Scarlett earn doing odd jobs?

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.