A set of Weights includes a 4 lb barbell and 6 pairs of white plates. Each pair of plate weighs 20 lbs. If x pairs of plates are added to the barbell oh, the total weight of the barbell and plates and pound can be represented by f(x)=20x+4 What is the range of the function for this situation?

A. 0 1 2 3 4 5 6

B. 4, 24, 44, 64, 84, 104, 124,

C. 0 2 4 6

D. 4, 44, 84, 124,

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.