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

[dubi2pro]

i knw im giving lots of question but please bare with me some more time!

sorry

 

[ahmadumar]

just check if im right, square root of n a-p/100 = r

oppps its wrong. i'll show

 

[ahmadumar]

just check if im right, square root of n a-p/100 = r

 

[ahmadumar]

i knw im giving lots of question but please bare with me some more time!

sorry

u have to use the compound interest formula here try it :3

 

[dubi2pro]

u have to use the compound interest formula here try it :3

Yes i used but its 281.001 something..

ans is 17. some thing

 

[ahmadumar]

Yes i used but its 281.001 something..

ans is 17. some thing

hahaha omg i'll give it a try :3
ur ans must be right

 

[ahmadumar]

Yes i used but its 281.001 something..

ans is 17. some thing

the reason why u got 281 is because u r using the wrong formula
the formula is A=P(1+ (r/100))^n
where A is the total amount after n years
And also the question is just asking for the interest. so u will have to minus 280 from ur answer to get the interest

 

[dubi2pro]

altight il check!


a part!!

 

[ahmadumar]

altight il check!


a part!!

 

[dubi2pro]

 

[dubi2pro]

this cumulative doesnt has the zig zag! :S

 

[dubi2pro]

pleasee do this one

making (r) the subj of formula

1/2 * 4/3 pie r ^3 =2096 cm^3

 

[Zubair Junjunia]

Here are some math notes which may be useful:
http://zstudynotes.wordpress.com/2014/04/11/cie-igcse-mathematics-extended-0580-notes/