Answer:
answer is in the step by step explanation.
Step-by-step explanation:
40 feet is the diameter so 20 feet is radius. 2 times pi times 20 is 125.663706144. if pi is 3.14 then it's 125.6. I hope that answered your question.
This is your answer
-581472
I dont think the answer is 129 unless you typed the problem in wrong. Order of operations say to do everything inside the perenthesis first so you would do the 3*2 which is 6 then divide the 12 by 6 and you get 2. so your new equation is 8^2+9(2)-7. Next distribute the 9 to the 2 that is inside the perenthesis. Square root the 8 also. Now it is 49+18-7. The answer would be 60 ...?
Answer:
11860.22 rev/hour
Step-by-step explanation:
The diameter if a cylinder, d = 21.02 inches
Radius, r = 10.51 inches
or
r = 0.875 feet
The linear speed of a point on the cylinder's surface is 18.12 ft/sec.
We need to find the angular speed of the cylinder.
The relation between the linear speed and the angular speed is given by :

Where
is angular speed

or

So, the required angular speed of the cylinder is 11860.22 rev/hour.
Answer:
C
Step-by-step explanation:
subtract