At 12.12 per hour, how much will I earnings 39.30 hours

3.24257..

Step-by-step explanation:

39.30 ÷ 12.12

It is Circle B

It is 3.14 m

Step-by-step explanation:

1.The diameter is twice the radius so the diameter of Circle b is 2 x 5 = 10 cm.

This diameter is larger and will have a larger circumference.

2.The circumference is the product of π and the diameter. Then the difference between the two circumferences is (circle B circumference) - (circle A circumference) = π·(10 cm) - π·(9 cm)

= π·(10 -9) cm = π·1 cm ≈ 3.14 cm