Advantages and disavadtages for paying with checks

Advantages: when its paying by check you can earn credit history
Disadvantages: Mishandling of account and exceeded expenses can cause a refund check and bad credit

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.