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How prepared are you all? For Maths IGCSE 0580? any tips, ideas?

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ahummm...........thats exactly wat im doing but u are not replyig to the question I posted!
can u just do me a favor that to post all questions u have over here and dont worry i'll answer all :D after all its discuss freely :D
 
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thanks bro! :D but why did u choose t= 1/5? it could be 1 as well cuz both when substituted equals 1 :S
 
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thanks but why are we taking the lower bound of 1 cm? also then why did u subtract it from 2?
 
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thanks but why are we taking the lower bound of 1 cm? also then why did u subtract it from 2?
look it says its to nearest cm. so while taking bounds u have to either add or subtract the half of what it is nearest to :D
if it was nearest to metre. than u would have subtracted 0.5m, right? its the same but only the units are changed. first to find lower bound u find what to subtract and it is half of what it is nearest to. in this case nearest to cm. take its half 0.5cm. now if u had to find upper bound u would have added this to 2 but u need lower bound so what u do is subtract it. but this is in cm and the actual measurement is in metres. so covert cm to m. 0.5cm=0.005m...
 
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326
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455
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look it says its to nearest cm. so while taking bounds u have to either add or subtract the half of what it is nearest to :D
if it was nearest to metre. than u would have subtracted 0.5m, right? its the same but only the units are changed. first to find lower bound u find what to subtract and it is half of what it is nearest to. in this case nearest to cm. take its half 0.5cm. now if u had to find upper bound u would have added this to 2 but u need lower bound so what u do is subtract it. but this is in cm and the actual measurement is in metres. so covert cm to m. 0.5cm=0.005m...
genius! thanks man! :)

and the file i gave u can u solve the graph one? only the (b) part its 1 mark i guess..
 
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326
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455
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73
look it says its to nearest cm. so while taking bounds u have to either add or subtract the half of what it is nearest to :D
if it was nearest to metre. than u would have subtracted 0.5m, right? its the same but only the units are changed. first to find lower bound u find what to subtract and it is half of what it is nearest to. in this case nearest to cm. take its half 0.5cm. now if u had to find upper bound u would have added this to 2 but u need lower bound so what u do is subtract it. but this is in cm and the actual measurement is in metres. so covert cm to m. 0.5cm=0.005m...
bro can u solve the 13 (b) part and 14 (b) part please! :(
 

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