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The volume of a can is 28.3 cubic inches (in.^3). If the radius and the height of the can are multiplied by a scale factor of 2, what is the volume of the new can?
 one year ago
 one year ago
The volume of a can is 28.3 cubic inches (in.^3). If the radius and the height of the can are multiplied by a scale factor of 2, what is the volume of the new can?
 one year ago
 one year ago

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ryuuBest ResponseYou've already chosen the best response.0
Please tell me how you got to the answer, this kind of material will be in my test tomorrow.. x.x
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
What kind of can? I assume it is is a Cylinder but...
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
It just says that, so I would assume it's a cylinder. =P
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Well the volume of a cylinder is pi*r^2*h.
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
When something is multiplied by a factor you replace the ariable by that same factor.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
So... replace r with 2, that's all?
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
And h. Do you understand why?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
ahh sorry word problems get me. No I don't.
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
When you scale something or multiplying by a factor you are basically saying "two times more than the original value" .
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
So when I say I multiply by a factor of 5 I am basically saying "Take your original value and multiply by 5"
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
Somewhat. So in some case, just guessing, it'd be like half of the original amount given? 28.3? or... x.x; lol I mean I get I have to replace it and why now
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Or for instance, when I say I multiply something by a factor of 7 I am saying "Take your original number and replace it by 7 times the original value" .
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
So, basically when multiplying by a factor, you replace the other numbers? in this case the radius and the height?
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Yeah. Replace it by whatever factor times that number.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
so 25.12 would be wrong i suppose haha.. xD?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
Sorry.. I learned this all before, but since it's a new teacher he shows us in a different way, and it's getting me all confused.. :/
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Well The volume is directly proportional to the height and the radius squared. So If you increases the radius and height by a certain factor the Volume increases by the same factor.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
honestly? still kinda lost. :
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Okay. Tell me what you don't understand.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
the thing i dont get is.. i get lost after they say the radius and height of the can are multiplied by the factor of 2
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
and i know 28.3 is the volume of the can
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
but im confused if ill need to use 28.3 # at all or just work out a certain equation like you said replace with the other things in my case i think this: 3.14(2)^2(2)
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Yeah you will use the 28.3
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Here Maybe a picture will help.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
oh i see, but.. then what's the radius? o.o
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
That's a badly drawn r XD .
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
XD! It's okay I understand. And I appreciate the help thanks a lot. i got a test tomorrow.. ><
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
and that teacher teaching his ways just gets me confused all the time, i mostly teach myself instead xD
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Did you understand me though?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
somewhat, im confused as to what happened to r and pi though xD
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
and why group in the replaced 2 with the r if you'll be replacing it?
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
The pi is still there. I replaced the radius with 2r because we are multiplying the radius by a factor of 2.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
so pretty much just leave the r alone, and just leave it aside and continue the problem?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
as well as with pi? and just multiply the new factors 8 and 28.3
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
No... :P . Rather replace the r by 2r because we are multiplying the r by a factor of 2 and then square the resultant.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
oh i see. ok, but that doesn't explain why pi is practically gone lol
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
No no. The pi is there. We can't multiply pi by a factor because pi is a fixed, constant number.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
sorry if i got you frustrated haha.. =X
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
can ya help me with another one? similar stuff just finding the area of complex and irregular figures
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
dont gotta lol just asking if you can or want to.
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
No I mean, I might not be able to solve it.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
Oh , kk, uhm it's just algebra all the same. here it goes. A rectangular mirror is 24 inches by 48inches. The frame around the mirror is 3inches. wide. Find the area of the mirror including the frame.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
I multiplied 24 and 48 and got 1,152 but that would just be the mirror's area. I also need the frames
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Did you draw a picture?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
Mhm. I shaded the frame to make it look differently. But i also tried multiplying all numbers and it doesn't add up
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
and i get a bit confused sometimes with this book with the problems cause sometimes they're 3 dimensional lol
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
and i mix up as to where to put the numbers on what side or what not
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
idk if im just messing myself up honestly haha
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
like i said i got 1152 lol
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
I think it's 1,620 inches ^2 .
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
Here look at this picture.
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
So you're sharing all 3s down the middle? and breaking em down? to add 6 to both 24 and 48?
 one year ago

Dido525Best ResponseYou've already chosen the best response.1
yeah because we are given the frame is 3 inches wide right? So it's 3 inches wide everywhere. Does that make sense?
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
yes it does thank you very much, once again. :)
 one year ago

ryuuBest ResponseYou've already chosen the best response.0
time to finish hw, bye, take care and i fan'd ya. :P
 one year ago
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