Answer:
18.8495559215
Step-by-step explanation:
The formula for a circumference of a circle is C=2πr. If the radius is 3, you have to multiply 3 by 2 (because of the 2 in front of π). Then you have 6π. That equals 18.8495559215
Answer
A=2πrh+2πr2=2·π·3·6+2·π·32≈169.646
8*40 = 320 * 2 = $640 for the 2 workers
640/2000 = 0.32
labor cost is 32% of the revenue
4.82
0.000082 + 0.0004 = 0.000482 = 4.82
