Question

After stepping into a room with unusual lighting, Toby's pupil has a diameter of 4 millimeters. What is the pupil's circumference?

Answer 1

12.56 mm

Step-by-step explanation:

Okay, so the formula is 2πr. If we take the value of pi as 3.14, it's going to be (2) 3.14 * 2 mm, because radius is half of the diameter.

3.14 * 2 = 6.28

(2) 6.28 = 12.56

Answer 2

The pupil's circumference is calculated using the formula C = πd, with Toby's pupil diameter being 4 mm. Multiplying by pi (3.14159), the circumference is approximately 12.57 millimeters.

Step-by-step explanation:

To calculate the pupil's circumference, we use the formula for the circumference of a circle, which is C = πd, where C is the circumference and d is the diameter of the circle. Given that Toby's pupil has a diameter of 4 millimeters, the calculation would be C = π × 4 mm.

Using the value of π (pi) as approximately 3.14159, we get the following result:

C = 3.14159 × 4 mm

C = 12.56636 mm

Therefore, the circumference of Toby's pupil is approximately 12.57 millimeters.