Mathematics
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OpenStudy (errinss):
im stuck
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OpenStudy (errinss):
OpenStudy (er.mohd.amir):
its very simple
OpenStudy (er.mohd.amir):
radius=diameter/2
vol v=(1/3)pi*r*r*h
where r is radius
OpenStudy (errinss):
\[V=\frac{ 1 }{ 3 }(\pi)*8^2*17\]
right?
OpenStudy (mathmate):
Right, plug in the numbers on your calculator!
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OpenStudy (er.mohd.amir):
no first find h with the help of slant height
OpenStudy (errinss):
@agent0smith
OpenStudy (agent0smith):
Use pythag to find h first. Notice the right triangle, r, h, and 17.
OpenStudy (errinss):
i dont get it
OpenStudy (errinss):
i know the radius is 8
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OpenStudy (er.mohd.amir):
use Pythagoras theorem in triangle BDE
OpenStudy (agent0smith):
Look at the diagram, the radius (which you have), h, and 17 make a right triangle
OpenStudy (agent0smith):
So use that to find h.
OpenStudy (errinss):
\[8^2+B^2=17^2\] this is what it should look like right?
OpenStudy (errinss):
b being H
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OpenStudy (er.mohd.amir):
correct
OpenStudy (agent0smith):
Yes, once you solve for h, THEN you can use the formula for the volume
OpenStudy (errinss):
289=17^2
64=64
\[289-64=225\]
\[\sqrt{225}=15\]
H=15
right?
OpenStudy (agent0smith):
Yes, now find the volume
OpenStudy (errinss):
\[V=\frac{ 1 }{ 3 }*\pi*8^2*15\]
\[V=\frac{ 1 }{ 3 }*\pi*64*15\]
\[V=\frac{ 1 }{ 3 }*\pi*960\]
\[V=1/3*3015.92\]
\[V=1005.30\]
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OpenStudy (errinss):
i did something wrong, my answer isn't a choice
OpenStudy (agent0smith):
It's reeeeeeally close though lol.... they did say to use 3.14 for pi ;)
OpenStudy (errinss):
ha i see what i did wrong lol
OpenStudy (errinss):
\[V=\frac{ 1 }{ 3 }*3014.4\]
\[V=1004.8\]
OpenStudy (errinss):
*pat my back* lol XP
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OpenStudy (errinss):
thx smith ^-^
OpenStudy (errinss):
OpenStudy (agent0smith):
*pats you on the back*
make a new question
OpenStudy (errinss):
you sound like a moderator lol >.<
OpenStudy (elijahrich1113):
do you still need help?
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OpenStudy (agent0smith):
Questions get too long and this is completely unrelated to the first one :P