math help please!!!!

Question

Find the circumference of each circle, use 3.14 for . Include units and round to the nearest tenth. Show work.

Only 5 and 6

Answer 1

The formula for finding the circumference of a circle is C=2*pi*r, where r is the radius. You stated to approximate pi to 3.14. Also, the radius is equal to half of the diameter.

5) C=2*pi*r

Find the radius by taking half of the diameter: r = 9/2, which means r = 4.5 inches.

C ≈ 2 * 3.14 * 4.5 (I am using the approximate symbol since I rounded pi to 3.14. Substitute pi with 3.14 and substitute r with 4.5.)

C ≈ 28.26 inches (multiply)

C ≈ 28.3 inches (round to the nearest tenth)

6) C=2*pi*r

C ≈ 2 * 3.14 * 5 (I am using the approximate symbol since I rounded pi to 3.14. Substitute pi with 3.14 and substitute r with 5.)

C ≈ 31.4 (multiply)

C ≈ 31.4 mm (The answer was already rounded to the nearest tenth.)