Question

Hey guys can you please help me with these questions​ please explained them

Answer 1

B for question 12

B for question 13

Explanation:

U = Union

n= intercestion

B'= not b

A"= not a

so AnB'

should be B

if 2.50 = 1

2.50x8=

20

1×8 =

8

should be $8