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PP2 Math question

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angell:
thanks piscecs:)

what about MY question:(

angell:
ok now i see the answer..um sorrrrry but i wanted to know part b? how do we find the co-ordinates?

angelic:

--- Quote from: angell on May 12, 2009, 10:14:04 pm ---find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

--- End quote ---

how did u find 1385.4  ??? .. i used the cylinder formula to find the volume of the glass and i got 197.9 ..

pisecs:

--- Quote from: angell on May 12, 2009, 10:14:04 pm ---find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

--- End quote ---

yes thats correct, i've explained on a pic


i've solved part b too, it's under a)
so from a), we got y=2x-4
and in b) we know that y=0
so we find x
i underlined the answer in pink

angelic:
everything is clear now .. thank u so much!!! :D ...
i cant believe that the exam is tomorrow .. im really worried!  :-[

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