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Mathematics 18 Online
OpenStudy (i_love_my_nieces):

question in comments

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.

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?

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|

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..

OpenStudy (i_love_my_nieces):

I'm very tried will you be on in the morning around 12am - 1pm or later?

TheSmartOne (thesmartone):

http://prntscr.com/6qkbo1 Without the lines: http://prntscr.com/6qkbqg

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

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

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