For this case we have that by definition, the circumference of a circle is given by:

Where:
d: Is the diameter of the circumference
According to the data we have to:

Substituting:

Rounding out we have that the diameter is: 80
Answer:
Option B
Answer:
i can help you of the math experience
You can distribute the q to both terms to get

The volume formula could be re-written to help understand this, as V = π*3r^2*3h. If you solve for this, you can conclude that the volume would be multiplied by 27.
Rewrite the inequality without the absolute value
-18 < x - 13 < 18
Add 13 to the whole equation
-18 + 13 < x < 18 + 13
Simplify
<u>-5 < x < 31</u>