Answer:
a. ![C=28\pi \ cm](https://tex.z-dn.net/?f=C%3D28%5Cpi%20%5C%20cm)
b. ![C=\frac{88}{1}\ cm](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B88%7D%7B1%7D%5C%20cm)
c. ![C=87.96 \ cm](https://tex.z-dn.net/?f=C%3D87.96%20%5C%20cm)
Step-by-step explanation:
The formula to find the circumference of a circle is:
![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
Where "r" is the radius of the circle.
In this case you can identify that:
![r=14\ cm](https://tex.z-dn.net/?f=r%3D14%5C%20cm)
Then:
a. Substituting the radius of the circle into the formula, you get:
![C=2\pi (14\ cm)\\\\C=28\pi \ cm](https://tex.z-dn.net/?f=C%3D2%5Cpi%20%2814%5C%20cm%29%5C%5C%5C%5CC%3D28%5Cpi%20%5C%20cm)
b. Substitute the radius into the formula (Remeber to use
) and then evaluate. So you get:
![C=2(\frac{22}{7})(14\ cm)\\\\C=\frac{616}{7}\ cm\\\\C=\frac{88}{1}\ cm](https://tex.z-dn.net/?f=C%3D2%28%5Cfrac%7B22%7D%7B7%7D%29%2814%5C%20cm%29%5C%5C%5C%5CC%3D%5Cfrac%7B616%7D%7B7%7D%5C%20cm%5C%5C%5C%5CC%3D%5Cfrac%7B88%7D%7B1%7D%5C%20cm)
c. Substitute the radius into the formula but this time you must use the π button in the calculator:
![C=2\pi (14\ cm)\\\\C=87.964 \ cm](https://tex.z-dn.net/?f=C%3D2%5Cpi%20%2814%5C%20cm%29%5C%5C%5C%5CC%3D87.964%20%5C%20cm)
Rounded to the nearest hundreth, this is:
![C=87.96 \ cm](https://tex.z-dn.net/?f=C%3D87.96%20%5C%20cm)