a family is 500 ft above the ground in the basket of a hot air balloon and ascending at the consistent rate shown. At that height someone accidentally drops a penny out of the balloon.

- "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."

its 50 miles away from the starting point

the answer is  

a.

4,624π mm2

step-by-step explanation:

answer is c

step-by-step explanation:

81/12=324/x

x=48