Mathematics
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OpenStudy (anonymous):
find the surface area of the cone in terms of PI
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OpenStudy (anonymous):
#8
OpenStudy (anonymous):
452.39
OpenStudy (anonymous):
452.39 square cm
OpenStudy (anonymous):
\[360 \pi \]
OpenStudy (anonymous):
mad schientist101- thats not an answer option
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OpenStudy (anonymous):
miriwire- huh?
OpenStudy (anonymous):
360 times pi
OpenStudy (anonymous):
here are the options
a. 144 pi cm^2
b. 150 pi cm^2
c. 153 pi cm^2
OpenStudy (anonymous):
oh, madscientist answer is there
OpenStudy (cwrw238):
in no. 8 is 12 the radius of base or diameter?
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OpenStudy (anonymous):
oh its A
OpenStudy (anonymous):
yep
OpenStudy (cwrw238):
area of come = pi r s + pi r^2
where s = length of slope
OpenStudy (anonymous):
i thought s=18
OpenStudy (cwrw238):
yes s = 18 but whats r?
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OpenStudy (anonymous):
r=12
OpenStudy (cwrw238):
ok - so answer to no. 8 is
144pi + 216 pi = 360 pi
OpenStudy (anonymous):
that's what i had got but it wasn't an answer choice listed
OpenStudy (cwrw238):
strange
OpenStudy (anonymous):
maybe so, she never replied back so maybe she got the right answer
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OpenStudy (cwrw238):
oh - hold on - its 144pi if 12 is the diameter of the base that is radius = 6:
36pi + 108pi = 144pi
OpenStudy (anonymous):
oh...haha it looks like 12 was the radius in the picture
OpenStudy (cwrw238):
no looks like 12 is diameter - thats why i asked about it
OpenStudy (anonymous):
I see it now...need to get my eyes checked lol