anonymous
  • anonymous
8.) The lateral area of a cone is 612 pi cm^2. The radius is 43 cm. What is the slant height to the nearest tenth of a centimeter? My answer: 9.1 cm. Is that correct? 9.) What is the lateral area and the surface area of the cone shown below? Round the answer to the nearest tenth. The figure is not drawn to scale.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
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anonymous
  • anonymous
my answer: LA= 1,187.5 ft^2, SA= 1,803.3ft ^2. Is that correct?
anonymous
  • anonymous

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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
jim_thompson5910
  • jim_thompson5910
lateral area \[\Large LA = \pi*r*s\] r = radius s = slant height
anonymous
  • anonymous
mhm
jim_thompson5910
  • jim_thompson5910
so LA = pi*r*s 612*pi = pi*43*s solve for s
anonymous
  • anonymous
I am guessing that I didn't do 8. correctly?
jim_thompson5910
  • jim_thompson5910
yes, #8 is incorrect
anonymous
  • anonymous
darn. Is it 14.2?
jim_thompson5910
  • jim_thompson5910
yes
anonymous
  • anonymous
okay. Thanks you for correcting me
jim_thompson5910
  • jim_thompson5910
I agree with what you got for #9
anonymous
  • anonymous
Alrighty.

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