Find the missing dimension. Use the scale factor 1 : 12.
Item Model Actual
Football helmet Diameter: mm Diameter: 21 cm

17.5 mm

Step-by-step explanation:

First, you need to find out what number times 12 equals 21. To do that, you simply solve 21 divided by  12, which equals 1.75 cm. Since you want the answer in mm, you multiply 1.75 by ten because one cm = 10 mm

Hope that this helps! (:

- "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."

4 candies

step-by-step explanation:

7 x 28 = 196

200 - 196 = 4 candies remaining.