Question

The equation of the circumference of a circle is c=2 pi r , where r is the radius of the circle. Compute the circumference of a circle whose diameter is 3.8 cm. Use the approximation pi = 3.14 and round your answer to one decimal place.

Answer 1

Answer: 6.22

Step-by-step explanation:

Answer 2

To calculate the circumference of a circle with a 3.8 cm diameter, use the formula c = πd. With π approximated as 3.14, the circumference c = 3.14 × 3.8 cm, which equals 11.9 cm when rounded to one decimal place.

Step-by-step explanation:

The equation of the circumference of a circle is c = 2πr, which can also be represented in terms of diameter as c = πd, since the diameter d is equal to 2 times the radius r.

To compute the circumference of a circle with a diameter of 3.8 cm using the approximation π = 3.14, you first need to substitute the value of the diameter into the circumference formula:

c = πd

c = 3.14 × 3.8 cm

Multiplying 3.14 by 3.8 cm gives us:

c = 11.932 cm

Rounding the result to one decimal place, we get:

c = 11.9 cm

This is the circumference of the circle with the given diameter.