Consider the inequality cos(2x) 0 by picking a value for x from each interval. She finds the following. cos(2x)>0 from 0 to π4 cos(2x) 0 from 3π4 to 5π4 Finally, Milan concludes that cos(2x)<0 on the interval [π4,3π4]. Part A: Which answer choice shows the correct analysis of Milan’s work? Part B: What is the domain of the inequality? Part C: What is the solution set for the inequality?

well my understanding of this question is they want you to use the y=14.1x -2.3 and put the coordinates they gave you onto the line segment of   y=14.1x -2.3

step-by-step explanation:

hdjd

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."