A CD player is sold at four different stores. which store is selling it for the lowest price?

A.) retail price: $108.68; discount: 17%
B) retail price: $103.35; discount: 13%
C) retail price: $114.01; discount 21%
D) retail price: $118.19; discount 24%

D is the cheapest

Step-by-step explanation:

108.68*0.17=$90.2

103.35*0.13=$89.9145

114.01*0.21=$90.0678

118.19*0.24=$89.8244

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6