Friday night is Pizza night at Ms. Kasman's house! I call my favorite pizzeria to find out the specials. The are offering either OPTION A: a pizza pie with a radius of 10 inches for $13.95 or OPTION B: a pizza pie with a circumference of 72 inches for $13.95. Which one should Ms. Kasman buy? A or B?

The last answer choice

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.