Sally bought the pizza show above for lunch which was cut into 10 equal slides. What percentage of the pizza did Sally eat if she had four slices? A.20% B.30% C.40% D.50%

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.