The formula for the circumference c of a circle with radius r is c = 2πr. which of the following is a formula for π (pi) of the circle in terms of the circumference and radius?
a. pi=c+2r
b. c-2r
c. pi=2r/c
d. pi/c/2r

The formula for the circumference C of a circle with radius r is

Now you should express in terms of C and r. Divide the previous equation by 2r:

correct choice is D.

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

answer: no

step-by-step explanation:

you are only given the cost not the amount of pounds.