Aflea of negligible size is trapped in a large, spherical, inflated beach ball with radius r. at this moment, it is equally likely to be at any point within the ball. let x be the distance of the flea from the center of the ball. using the fact that the volume of a sphere of radius r is 4tr /3, for x, find (a) cumulative distribution function f. ( the probability density function f. (c) expected value. d) . the variance.

a

step-by-step explanation:

answer   download the app called socratic on your phoner:

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."

step-by-step explanation: