IIn a new hotel containing 100 rooms, Tom was hired to paint the numbers 1-100 on the doors. How many times will Tom have to paint the number 8?
Don't guess too quickly. Think about it first.

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.