An artist used silver wire to make a square that has a perimeter of 40 inches. she then used copper wire to make the largest circle that could fit in the square as, shown below.

what is the circumference of the copper circle? use 3.14 to represent pi.

a. 3.14 inches
b. 31.4 inches
c. 15.7 inches
d. 78.5 inches

C

Step-by-step explanation:

The side of square will be equal to ciumference of the circle. It is very simple. Now that I told u the key point u could answer the rest.

- "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."