A. The range of heights is 63 inches. B. There are 25 plants in the experiment.

C. More plants are 56 inches tall than are 62 inches tall.

D. Most of the plants are under 61 inches tall.

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.