In the accompanying diagram of circle o with diameter AOC m ACB = 48 which of the following is the measure of BC

BC= AOCcos48

Step-by-step explanation:

Any angle subtended by diameter is 90°

So, angle ABC is 90°.

cos 48 = BC/AOC

BC= AOC× cos48

1,918

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."