Julie wanted to earn money to attend cheerleading camp. she started with some birthday money, and every month she saved $40 from her babysitting jobs. after 5 months, she had $260. how many months did it take her to save enough to pay the $420 camp tuition?

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.