The endpoints of CD ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ CD¯ are C(−2, 0) C(−2, 0) and D(4, 9) D(4, 9) . The coordinates of the midpoint M M of CD ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ CD¯ are

13875138answer:

step-by-step explanation:

use a calculator!

is only a line? i think so

- "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."

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.