3. a. draw a scaled copy of the circle using a scale factor of 2. b. how does the circumference of the scaled copy compare to the circumference of the original circle? c. how does the area of the scaled copy compare to the area of the original circle?

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.