If the circumference is 18in , what is the diameter ?
A)6 in
B) 4in
C)5.73 in
D)5 in
E)8.5 in

C

Step-by-step explanation:

Circumference can be found using

c=d

We know the circumference is 18, so we can substitute it in

18=d

We want to find d, so we have to isolate it.

To do this, divide both sides by pi

d=5.72957795131

Rounded to the nearest hundreth

d=5.73

Diameter is 5.73 inches, or choice C

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..