Sam blew up 3 times (the number of balloons Callie blew up and 8 more). Callie blew up c balloons. Write an expression for the number of balloons Sam blew up.

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.