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Mathematics 19 Online
OpenStudy (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.

OpenStudy (anonymous):

OpenStudy (anonymous):

my answer: LA= 1,187.5 ft^2, SA= 1,803.3ft ^2. Is that correct?

OpenStudy (anonymous):

@mathstudent55 @pooja195

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

@kropot72

OpenStudy (anonymous):

@nincompoop

jimthompson5910 (jim_thompson5910):

lateral area \[\Large LA = \pi*r*s\] r = radius s = slant height

OpenStudy (anonymous):

mhm

jimthompson5910 (jim_thompson5910):

so LA = pi*r*s 612*pi = pi*43*s solve for s

OpenStudy (anonymous):

I am guessing that I didn't do 8. correctly?

jimthompson5910 (jim_thompson5910):

yes, #8 is incorrect

OpenStudy (anonymous):

darn. Is it 14.2?

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (anonymous):

okay. Thanks you for correcting me

jimthompson5910 (jim_thompson5910):

I agree with what you got for #9

OpenStudy (anonymous):

Alrighty.

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