Find the circumference of the following circle. Use 3.14 for π. Round to the nearest hundredth, if necessary.
55.52
57.52
56.52
56.42
the circle is 9cm

C is the correct answer

Step-by-step explanation:

at first i thought 9 was the diameter however none the answers match so i knew it was the radius

so i multiplied 9 by 2 then multiplied by 3.14

any options?

step-by-step explanation:

- "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."