Answer:
Johnny is wrong.

Step-by-step explanation:
Johnny is wrong.
A better definition would be:
is the set of all elements that belong to at least one A or B.
So, the elements that belong to both A and B, like c and d in this exercise, also belong to
.
So:

Answer: 4000
Step-by-step explanation:
don’t have it just know that’s the answer
Answer:
The answer is b ($9.74)
Step-by-step explanation:
I got it right (: