The standard form of the equation of a circle is:

Where the point (a,b) represents the centre and r is the radius. So, given your information, the equation will be:
Answer:
35/100 *80=25
Step-by-step explanation:
Answer:
43.7
Step-by-step explanation:
4 secs on was 78.4 meters, 5 was 122.5, 122.5-78.8=43.7
Answer:
23X
Step-by-step explanation: