anonymous
  • anonymous
A project manager placed an order for ball bearings for some heavy duty manufacturing machinery. What is the surface area in square millimeters of one of these bearnings if it has a diameter of 0.8 inches?
Mathematics
chestercat
  • chestercat
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Mertsj
  • Mertsj
SA=4pir^2
Mertsj
  • Mertsj
SA=4pi(.4)^2 SA=.64pi = 2.01 mm^2
anonymous
  • anonymous
my software isnt accepting the answer

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Mertsj
  • Mertsj
Well read the directions for the form the answer is supposed to be in.
Mertsj
  • Mertsj
Oh no. There is a unit conversion involved.
Mertsj
  • Mertsj
2.01 in^2 has to be converted to mm^2
anonymous
  • anonymous
ok i got it thanks
Mertsj
  • Mertsj
|dw:1327717979571:dw|
Mertsj
  • Mertsj
yw

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