Circumference is 2πr or πd.
So for part 1 the diameter = 9in.
Plug in 9 into the πd formula.
π*9 = 9π in. ≈ 9*(22/7) ≈ 28.29in

For part 2 (from what I can see) they want you to find the same circumference in centimeters(cm) and use 22/7 for π so first convert the radius to cm.
9 in = 9*2.54 = 22.86cm
Next plug in the values into the Circumference formula: π*d
(22/7)*(22.86) ≈ 71.85cm

Hope this helps!

4 0

3 years ago

Erica runs a daycare center. So far this year, the enrollment has consisted of 3 babies and 12 children of other ages. Consideri

gavmur [86]

Answer:

Step-by-step explanation:

3 out of the 12 babies is equal to 1/4 of the babies so assuming the ratio of babies to children of other ages stays the same you'll need to find 1/4 of 20 which is 5.

7 0

3 years ago