If a circle has a circumference of 81.64 cm, what is the radius?

13cm

Step-by-step explanation:

c = Circumference=pid= 81.64   To find the radius of a circle you can just divide the diameter by 2.

pi = 3.14

d = diameter=c/3.14                  Pi is always 3.14 or 22/7.

d = 81.64/3.14

d = 26

r= radius= 26/2

radius=13 cm

Step-by-step explanation:

2 5/8 is the final answer! : )

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.