Final answer:
To find the diameter given a circumference of 94.2 millimeters and using π as 3.14, divide the circumference by π resulting in a diameter of 30 millimeters.
Step-by-step explanation:
The problem is to find the diameter of a circle when given the circumference. The formula to relate circumference (C) and diameter (D) is C = πD. Given that π is approximately 3.14 and the circumference is 94.2 millimeters, we solve for the diameter using the formula:
D = C / π
By substituting the given values, we have:
D = 94.2 mm / 3.14 = 30 mm
Therefore, the diameter of the circle is 30 millimeters.