It is a 125% increase from 20 to 45
Monomials are the expressions with one terms.
A.) 
Since, it has only one term. Therefore, it is a monomial.
B.) 
Since, it has two terms. Therefore, it is not a monomial.
C.) 
Since, it has only one term. Therefore, it is a monomial.
D.) 
Since, it has only one term. Therefore, it is a monomial.
E.) 
Since, it has only one term. Therefore, it is a monomial.
F.) 
Since, the variable is in the power. So it is not a monomial.
G.) 
Since, the power is not a integer. Therefore, it is not a monomial.
Answer:
3 4 6
Step-by-step explanation:
To find the answer to that, you have to see how many numbers are between 13 and 31. There are 18 numbers between 13 and 31. Divide 18 by 2 and you will get the number halfway. 9 is halfway between 13 and 31. So, add 9 to 13 and you get 22.
The answer is 22.
Hope I helped