help needed
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Question

help needed
http://prntscr.com/zhbtm

mertsj · Answer

Didn't we settle this problem this morning?

anonymous · Answer

mertsj you said the work was not consistent  iam confused a lot due to this problem

phi · Answer

your line for 4 pi (2.57)^2  is not 166.   can you get a calculator and get the right number ?

mertsj · Answer

According to the comment your teacher made about using the relationship between the side length, the surface area, and the volume you should scrap the incorrect solution you have and say the following:

mertsj · Answer

When the side length is doubled, the surface area is multiplied by 4 and the volume is multiplied by 8.  
The original volume was 71 cm^3.  The new volume is 8 x 71cm^3=568cm^3

anonymous · Answer

so we just have to show the volume here nothing else

mertsj · Answer

When it says "how much air does the balloon hold", it is asking for volume.

anonymous · Answer

http://prntscr.com/zhe9h

anonymous · Answer

now is it correct

anonymous · Answer

i am realizing iam moving in circles

mertsj · Answer

$$\frac{V}{71}=\frac{5^3}{10^3}$$

mertsj · Answer

Then solve for V

mertsj · Answer

You don't need that step that says that V = that proportion.

anonymous · Answer

cool thanks

anonymous · Answer

can you clarify another of my question

mertsj · Answer

And please note that 5^3/10^3=1/8

anonymous · Answer

ill make  a new post if necessary

mertsj · Answer

I can try.

mertsj · Answer

That would be helpful since this one is getting rather long.