Mathematics
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OpenStudy (i_love_my_nieces):
question in comments
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OpenStudy (i_love_my_nieces):
OpenStudy (acxbox22):
do you know the formula for surface area of cone?
OpenStudy (i_love_my_nieces):
A=πr(r+h2+r2)
OpenStudy (jdoe0001):
hint: \(\large {
\textit{total surface of a cone}=\pi r\sqrt{r^2+h^2}+\pi r^2\quad
\begin{cases}
r\to radius\\
h\to height
\end{cases}
}\)
OpenStudy (i_love_my_nieces):
Yeah that's what I put I guess it didn't show up. Please show your work when you post the answer.
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OpenStudy (i_love_my_nieces):
@jdoe0001
OpenStudy (i_love_my_nieces):
can you fill in the blanks and show your work please @jdoe0001
OpenStudy (jdoe0001):
hmmm? nothing left there really
just use the provided "radius" and "height"
and that'd give you the total surface area
OpenStudy (i_love_my_nieces):
@TheSmartOne can you check my work?
TheSmartOne (thesmartone):
Where is your work?
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OpenStudy (i_love_my_nieces):
I am writing it down give me a second please
OpenStudy (i_love_my_nieces):
\[3.14\times4\sqrt{4^{2}}+7^{2 +}3.14+4^{2}\]
OpenStudy (i_love_my_nieces):
@TheSmartOne I'm finished
OpenStudy (i_love_my_nieces):
\[= 115.21\]
TheSmartOne (thesmartone):
7 is not the correct height.
|dw:1428373783763:dw|
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OpenStudy (i_love_my_nieces):
What do you mean it's not the correct height??
TheSmartOne (thesmartone):
That is not the height, that is the length of the side of the cone.
OpenStudy (i_love_my_nieces):
Well then what is the correct answer?
TheSmartOne (thesmartone):
Solve for height using \(\sf a^2+b^2=c^2\) and then substitute that number in place of the 7 as 7 is wrong.
|dw:1428373934054:dw|
OpenStudy (i_love_my_nieces):
Um it's a cone not a triangle..
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OpenStudy (i_love_my_nieces):
I'm very tried will you be on in the morning around 12am - 1pm or later?
TheSmartOne (thesmartone):
Not sure, I have school.
OpenStudy (i_love_my_nieces):
What do you mean it's spring break??
TheSmartOne (thesmartone):
I said school, not spring break. lol
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OpenStudy (i_love_my_nieces):
I know you said school. I'm on spring break. Are you not?
TheSmartOne (thesmartone):
No.
OpenStudy (i_love_my_nieces):
Oh are you in college?
TheSmartOne (thesmartone):
Yea.. gtg now. Bye
OpenStudy (i_love_my_nieces):
Bye hopefully I will get to talk to you tomorrow so you can help me with math