A company has decreased the weight of its boxes of macaroni by 13% . If the new weight of the box is 14.4 ounces, what was the original weight of the box?

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.