Atravel agency runs a new ad for beach vacations. the ad poster shows a large image of a bottle of sunscreen, based on a scale of 9: 1 in cm.

if the actual bottle of sunscreen was 10 cm long, how many cm is it in the poster?

- "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."

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3