Which number line would not describe a situation where the midpoint between points a and b is 2 1/2?

Option C

Step-by-step explanation:

We know that in a number line numbers all (rational preferably) would be marked on a line in a chronological order.

Mid point of A and B would be the average value of A and B.

Here given that mid point is 2 1/2

This implies average of A and B is 2 1/2

Or total of A and B should be 5

Out of 4 options let us check which gives total 5.

A) (2,3) .. Total is 5

B) (-4,9)..Total is again 5

C) (-4,8)..Total is not 5 but 4

D) (-0.75, 5,75) .. Total is 5

So out of these 4 options only C would not describe a situation where the midpoint between points A and B is 2 1/2

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64