The circumference is 56.52 inches. The area of the mirror is inches squared.

Round your answer to the nearest tenth of a square inch (Use 3.14 for π)

Options: 56.5, 254.3, 798.6, 1,017.4

a is the right answer

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

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm