Acircular ring has a diameter of 20 meters, find its circumference a. 62.8 meters b. 40.78 meters c. 54.67 meters d. 200 meters

You must know that the formula for getting the circumferance is circumferance=pi times diameter, so in your problem it would be 62.8 = 3.14x (x is the variable standing for the diameter) so then you divide 62.8 by 3.14 either with long division or by using a calculator and you get 20

The answer to your question is A. 62.8 meters.

Hope that this helps, have a great day, chao!!

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

answer: it is 8

step-by-step explanation:

you know why its 8