Answer:

Step-by-step explanation:
In Venn sets, we have that:

In which n is the number of elements that each set contains.
In this question:

So

So

B. 10 because 6^2+8^2 is 100 and the square root of 100 is 10
Answer:
4 because you divide 3 and 15 by three which gives you 5 then divide 20 by that gives you 4