Qualification > Math

IGCSE MATHS Doubts

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Adzel:
Answer this one please too; +explaination

thenewkid™:
may/june 2009 q18 variant 1 pls
Thanks

Ghost Of Highbury:

--- Quote from: Adzel on May 11, 2010, 10:18:05 am ---I got: y3 < y2 < y0 < y-1

but mark scheme says: y3 < y-1 < y0 < y2

--- End quote ---

ur way : -8 < 4 < 1 < -0.5 = incorrect

ms way : -8 < -0.5 < 1 < 4 = correct

check ur calculations again :)

(-2)^3 = -8

(-2)^2 = 4

Baladya:
If we want to calculate lower and upper bound of lets say 6-4.
For upper bound we minus 6.5 minus 3.5 and for lower bound 5.5 - 4.5?

Thanks

Adzel:
Ans Q18 (a)   1080           33
                  ------- =  -------- = 320 cm3
                      s             23

          
            (b)      s             32
                  ------- =  --------  = 567 cm2
                    252            22

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