create the smallest cylinder possible with the tool and record the values of the radius, height, and volume in terms of pi. scale the original cylinder by the given scale factors and then record the resulting volumes in terms of pi to verify the formula v'=v x k cubed holds true for a cylinder

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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.