Answer: 6.28 cm
Explanation: The radius of a circle is half of the diameter, therefore you divide the diameter by two to find the radius.
Here are the steps, also use photo math for fractions it explains and shows step by step. Also its free
Answer:
-1/2
Step-by-step explanation:
The slope is the change in y over the change in x.

For this question:

the reciprocal is 15 by 12