Four pencils are held together with a band.
Each of the pencils diameter 10mm.
Find the length of the band in this position
Give your answer in terms of π.

20πmm

Step-by-step explanation:

each pencil diameter=10mm

each pencil diameter=radius Of The band

Radius of band=10mm

Circumference of band=2 x π x radius

Circumference of band=2xπx10

Circumference of band=20π

The length of band is the circumference Of The band

There length of band is 20πmm

- "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."

there is nothing below so i cannot

step-by-step explanation: