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402 cubic squared

Step-by-step explanation:

so you have a triangle and rectangle shapes so find area of each on and add them

10 x 28 = length times with = 280

28-12 = 16 and 24 - 10 = 14

14 x 16 x 1/2 = base times hight times 1/2  = 122

122 + 280 = 402

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