Answer:
C.
Step-by-step explanation:
Recall that:

For this particular question, you just have to look for the radical containing a negative sign under the square root i.e a negative radicand.
That will be option C.
This is given as

This can be rewritten to reveal the complex part as:

Therefore the correct answer us option C
Answer
Relative risk= 0.742
Odds ratio= 0.745
Detailed calculation shown in diagram:
Answer:
a c a b
Step-by-step explanation:
First divide both sides by 2:

Move the constant term to the right side:

Since

we want to have

Then

So in our equation, we need to add 49/16 to both sides in order to complete the square:

