3. A rectangular flower garden 12m long and 9 m wide is divided in te equal sections for 6 kinds of flowers. What are three possible perimeters for one section of the garden.​

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 answer should be c.