Answer:
0.8
Step-by-step explanation:
We begin with the expression: 
First, we need to convert the fractions into decimals to make this easier.
and 
Once we have this, we can simplify it

Answer:
x=1
You solve for x by cross multyplying
Answer:
Step-by-step explanation:
butt
Answer:
D. No, because group A is already the control group.