Select all ratios equivalent to 4:9.
44:99
7:12
81:36

Step-by-step explanation:

44:99 can be reduced by 11 to 4:9

7:12 is not equivalent because it is already reduced to its simplest term.  But when multiplied by 2, you get 14:24

81:36 can be reduced to 9:4 which is not the same as 4:9.  It would be if it was flipped.

Take 1:2 and 2:1

For every 2 boys, there is 1 girl.  If the numbers were flipped it'd be for every 2 girls, there is one boy.  So you see, they are not the same.

a

step-by-step explanation:

one peck is 9.309 quarts

9.309x 2