What is the circumference of a circle with a diameter of 30 centimeters?
a. 94.2 centimeters
b. 188.4 centimeters
c. 9.55 centimeters
d. 47.1 centimeters

option a is correct.

the circumference of a circle is, 94.2 centimeters

step-by-step explanation:

circumference of a circle can be found by multiplying by the diameter of the circle.

i.e, where

c is the circumference of a circle

d represents the diameter of a circle

and use value of

given: the diameter of a circle = 30 centimeters.

using circumference formula, we have

substitute the given value of d = 30 cm we have;

therefore the circumference of a circle is, 94.2 centimeters

depending on others is critical to survival. my source is apex!

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225