Question

What is the diameter of a circle with a circumference of 84.78 inches? Use 3.14 for π.

Answer 1

26.99

Answer 2

okay

Answer 3

The formula for the circumference of a circle is C = 2πr, where C is the circumference, π is the mathematical constant pi, and r is the radius of the circle.

We can rearrange this formula to solve for the radius:

r = C / (2π)

Substituting the given circumference of 84.78 inches and using 3.14 for π, we get:

r = 84.78 / (2 x 3.14) ≈ 13.5

Therefore, the radius of the circle is approximately 13.5 inches.

To find the diameter, we simply multiply the radius by 2:

d = 2 x r = 2 x 13.5 = 27

Therefore, the diameter of the circle with a circumference of 84.78 inches is approximately 27 inches.

Answer 4

Can u help with another one plz?

Answer 5

A mountain bike tire completes 20 revolutions and travels 136 feet. Rounded to the nearest inch, what is the diameter of the bike’s tire? Use 3.14 for π.

Answer 6

We can use the formula for the circumference of a circle to solve this problem. The circumference is equal to the distance traveled by the tire during one revolution. Let d be the diameter of the tire, then the circumference is:

C = πd

If the tire completes 20 revolutions and travels 136 feet, then the total distance traveled by the tire is:

total distance = 20 revolutions x circumference = 20πd

We can now solve for the diameter d:

20πd = 136

d = 136 / (20π)

d ≈ 1.09 feet

To convert this to inches, we multiply by 12, since there are 12 inches in a foot:

d ≈ 13.08 inches

Rounding to the nearest inch, we get:

d ≈ 13 inches

Therefore, the diameter of the mountain bike tire is approximately 13 inches.