Which equation represents the total price (p) paid when buying books (b) that cost $3.99 each? how much do 13 books cost?

a. b = 3.99p; $51.87
b. b = 3.99c, $51.87
c. p = 3.99b; $0.31
d. p = 3.99b; $51.87

Your answer is D p=3.99;$51.87

Step-by-step explanation:

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

b mark me branliest thx

step-by-step explanation: