PLEASE HELP DUE IN 3 minutes

15%

Step-by-step explanation:

First add together the percentages that have been shown to you. It should look like this:

35+25+15+10=85

Know that every pie chart must add up tp 100%, and this is only 85%. We should subtract the 85% we have from 100%. It should look like this:

100-85=15

Therefore, 15% is your answer.

- "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."