Help is needed over here yo !

13.

14.

15.

Step-by-step explanation:

To find the circumference of a circle, the formula is , with "C" being the circumference and "r" being the radius.

In question 13, the radius (r) is shown as 3ft. When you put this into the equation, it should look like this:

Simplify.

Follow the same steps in questions 14 and 15. In 14, 9 is the diameter, which makes the radius 4.5.

The final answers are shown above.

Have a good day!

5.25 ounces

step-by-step explanation:

divided 3/4 and 6

- "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."