9) The drawing below is a scale drawing of an equilateral pentagon with sides of 3cm. The scale factor between the scale drawing and actual object is 1cm : 4m. Determine the perimeter of the
actual object

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.