HEL Mr. Brown has a rectangular garden in his backyard. The garden is 8.5 feet long and 3.5 feet wide. The border that he plans to use costs $1.99 per foot. How many feet of border will Mr. Brown need to order to go around his garden? How much will it cost?

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.