gabbyalicorn
  • gabbyalicorn
The lid for a circular plastic food container has a diameter of 9 cm. What is the approximate area of the top of the lid? Use 3.14 to approximate pi and round your answer to the nearest hundredth. 2 x pi x 9?
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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Michele_Laino
  • Michele_Laino
the requested area is given by the subsequent formula: \[A = \pi \times \frac{{{9^2}}}{4} = 3.14 \times \frac{{81}}{4} = ...c{m^2}\]
gabbyalicorn
  • gabbyalicorn
62.775 = 1,017.36
Michele_Laino
  • Michele_Laino
no, it is: \[ = \pi \times \frac{{{9^2}}}{4} = 3.14 \times \frac{{81}}{4} = 63.585\;c{m^2}\]

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gabbyalicorn
  • gabbyalicorn
63.585= 63.585 yeppers
Michele_Laino
  • Michele_Laino
now you have to round off to the nearest hundredth, what do you get?
gabbyalicorn
  • gabbyalicorn
64.
gabbyalicorn
  • gabbyalicorn
am i right?
Michele_Laino
  • Michele_Laino
I think not, for example if I have to round off this number to the nearest hundredth 1.156 then I get: 1.16
Michele_Laino
  • Michele_Laino
so, what do you get?
gabbyalicorn
  • gabbyalicorn
oh 63.60
Michele_Laino
  • Michele_Laino
better is 63.59
gabbyalicorn
  • gabbyalicorn
:D
Michele_Laino
  • Michele_Laino
:)
gabbyalicorn
  • gabbyalicorn
Thankies!
Michele_Laino
  • Michele_Laino
:)

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