How many percent is the change in the price, if: the price was $75 and now it is $300?

300% change (Increase)

Step-by-step explanation:

300 divided by 75 = 4

which means

75 X 4 = 300

75 = 100% of the original price

100% X 4 = 400% increase

10 you would take 50/ .2

step-by-step explanation:

- "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."