Qualification > Math
IGCSE MATHS DOUBTS HERE !!!!
astarmathsandphysics:
For answer to bearing question see attachment
~ Miss Relina ~:
guys it is really urgent please help here guys it is really urgent please help here
http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w05_qp_4.pdf
Q 7 ( c)(ii)
Dhampiresa:
how to solve this, which co-ordinates i need to use to find the inverse :S!
http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_s11_qp_42.pdf
question 8 (b) (ii)
Saladin:
--- Quote from: Dhampiresa on May 12, 2012, 10:35:13 am ---how to solve this, which co-ordinates i need to use to find the inverse :S!
http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_s11_qp_42.pdf
question 8 (b) (ii)
--- End quote ---
Not inverse, this is simply stretch. Check your IGCSE Math book in the Matrices chapter, you should have an example like this there. I am not going to solve it for you, because then you would not learn what its all about.
astarmathsandphysics:
The pool empties at a rate of V=pi r^2 h =pi *12.5^2 *14 =6872 cm^3/s
Divide the amount of water in cm^3 by this. I make the volume 1.512*10^9
the time is 1.512*10^9/6872=220000 seconds
or 220000/3600 =61 hours or 2 days 13 hours
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