It's the third choice because a biconditional statement is an "if and only if " statement, using all the same words in the original statement.
Answer:
The answer to the question is A
Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
= 
Answer:
it's 60
Step-by-step explanation:
I have done that before
To find the diameter of the radius you need to multiply 3.5 x 2 = 7