A particle travels along the x-axis such that its position at time t is given by the function x(t)= 2t^2+t. What is the average speed of this particle over the interval 2 is less than or equal to t which is less than or equal to 10 A-4
B-200
C-32
D-25

- "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."

hint: which coefficient is a multiple of 360°?

step-by-step explanation: