Mrs. Dawson wants to build a rectangular fence on her property for her three labrador retrievers. The fence will be attached to her house so only 3 sides need
fencing. She has 9248 square feet of property available to fence. Choose the
equation that you would use, after substitution, to take the derivative of.

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.

The right answer is option d.