16b. Always. (Not sure why ‘Sometimes’ was wrong. It will be coplanar if they are in the same plane.
16c. Never. If two planes intersect, they intersect through half of the plane, not a point of the plane.
It’s for sure B the formula for circumference is
Pi times the diameter and the diameter is double the radius so it’s pi multiplied by 8
I don't understand either.
The quotient is 
Explanation:
The expression is 
Now, reciprocal the term
and convert ÷ to ×

Taking the common terms out, we get,

Factorizing each numerator and denominator, we get,

Multiplying the terms, we have,

Cancelling the common factors, we get,

Thus, the quotient is 
Answer:
Step-by-step explanation:
|3 1/4 | = 3.25
|-2 1/3| = 2.33
3 3/4 = 3.75
2 2/3 = 2.66
least to greatest : |-2 1/3| , 2 2/3 , |3 1/4|, 3 3/4