Qualification > Math
IGCSE MATHS Doubts
Shazizzzle:
--- Quote from: 33oomar on May 11, 2010, 06:53:01 pm ---what is the rule for compound intrest please no symbols full words
--- End quote ---
The principal amount is the one you invest.
The formula for compound interest, P(1+r/100)^t, is when, P is principal amount, r, the rate, and t, the time.
If the rate is yearly, then the time, t, must too be in years.
If the rate is monthly, the time, t, must be monthly too.
The answer you get to the formula above IS NOT THE INTEREST. It is the TOTAL AMOUNT.
If you invest 200, and the answer you get to the formula is 300, the 300 is not the interest, rather the TOTAL you get.
The interest is, total - principal, 300 - 200 = 100.
rahuldevnani93:
Guys I need the markscheme for the old paper 1988 - 1995
Please
Email to :- rahul_gurukul@yahoo.com
Vin:
--- Quote from: Fastal on May 11, 2010, 06:02:56 pm ---2009 may/june
22c
i know the answer is probably staring at me in the face, but please tell me :/
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sorry its a bit untidy .. i think its a lot untidy .. :)
The Golden Girl =D:
--- Quote from: rahuldevnani93 on May 11, 2010, 06:59:13 pm ---Guys I need the markscheme for the old paper 1988 - 1995
Please
Email to :- rahul_gurukul@yahoo.com
--- End quote ---
it's in this website jut so u know ..ohh but not the whole thing ::)
Baladya:
http://www.freeexampapers.us/IGCSE/Maths/CIE/2009%20Nov/0580_w09_qp_4.pdf
2)iv) I know its a shear, i know the invariant line is the y-axis, i thought the shear factor was 1 (4/4=1). But the answer says -1. Why???? >.< >.<
By the way.. for probability, we can simplify the fraction right? cuz the calculator just gives u the simplest form and its easier...
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