Answer:
a.
b.
c.
Step-by-step explanation:
The formula to find the circumference of a circle is:
Where "r" is the radius of the circle.
In this case you can identify that:
Then:
a. Substituting the radius of the circle into the formula, you get:
b. Substitute the radius into the formula (Remeber to use ) and then evaluate. So you get:
c. Substitute the radius into the formula but this time you must use the π button in the calculator:
Rounded to the nearest hundreth, this is: