Explanation:
For 11.)
Is 20 females to 8 males equal to 34 females to 10 males
The way to find this is divide 20 by 8

Doing the other one, 34 by 10

2.5 does not equal 3.4, which means they are NOT equivalent.
You do the same with #14
8 to 6
12 to 10


Again, not equivalent since 1.3 does NOT equal 1.2