Answer:
B
it is an increase of 400%
84
Step-by-step explanation:
Find all probabilities:
A. False
B. True
C. False
D. False
3(6-f)-4=3f-4
First is expand
18-3f-4=3f-4
Combine like terms
14-3f=3f-4
18-3f=3f
18=6f
f=3