A pair of similar figures is given below. (Note: the figures are not drawn to scale.) The sides BC and DE are corresponding sides. Use the information below to find B C in Figure 1 and the area of Figure 2.​

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.