In math class, Abby learned that the ratio between the surface area of a cube and the area of one side is 6 to 1. When Abby got a cube-shaped box in the mail, she decided to test this fact. The area of one side of the box was 20 square inches. What was the surface area of the entire box?

120 sq in

Step-by-step explanation:

20 * 6 = 120 sq in

560

step-by-step explanation:

giggidy

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional