Help! Seth has money in his savings account. He is going to use 15% on this to buy a bicycle. If he spends $120 on the bicycle, how much was in his savings account before buying the bicycle?

Ihave, but this question is gonna probably get deleted.

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.