The circumference of a circle is 20π cm. what is the diameter of the circle? a) 4 cm b) 5 cm c) 10 cm d) 20 cm

Since you are given the circumference and want to find the diameter, isolate d in the formula for circumference: C = πd.

C = πd

Divide both sides by π.

C/π = d

d = C/π

Plug in the given value for C and solve for d.

d = C/π

d = 20π/π

The pis cancel out, leaving 20 on the left side of the equation.

d = 20

D) 20 cm

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%