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#16986 2004 Paper 2 Q 11.

Posted by gary on 26 March 2005 - 06:28 PM in Problem Questions

I am stuck at the beginning of this question,it is the 8 mark question at the end of last years paper 2.

F(x) comes from the formula 2x- 0.5x2 but where does g(x) come from?



#16990 2004 Paper 2 Q 11.

Posted by gary on 26 March 2005 - 07:59 PM in Problem Questions

the integral of b a =

f(x) - g(x)

is that the standard equation you use, f(x) = 2x- 0.5x2 how would you get the g(x) equation.



#6207 Growth of democracy

Posted by gary on 11 September 2004 - 05:28 PM in History

Thank you for the help would you be able to give me a paragraph plan.



#23541 Democracy Quotes

Posted by gary on 15 May 2005 - 09:59 PM in History

Anyone know where I could find any quotes.



#31083 Thanks :)

Posted by gary on 31 May 2005 - 06:07 PM in Chemistry

Thanks helped me so much this year.



#6921 INT 2 TUTOR

Posted by gary on 10 October 2004 - 10:26 AM in Mathematics

If you are stuck with anything ask me I done well in Int 2 last year.

I don't know any tutors but sorry.



#49710 Books For Sale

Posted by gary on 16 August 2005 - 02:21 PM in New Sixth Years

Past Papers:

Higher History 2000-2005
Higher Mathematics 2000-2005
Higher English 2001-2005

Revision:

Leckie and Leckie Higher Mathematics Course Notes
Leckie and Leckie Questions In Higher Mathematics
Leckie and Leckie Higher Physics Course Notes
Leckie and Leckie Questions In Higher Physics
Leckie and Leckie Questions In Higher Chemistry
Leckie and Leckie Questions In Higher Chemistry
Leckie and Leckie Higher English Course Notes
Hodder Gibson How To Pass Higher Maths
Chemcord Revision Notes For Higher Chemistry
Chemcord Revision Notes For Higher Chemistry
Chemcord Revision Notes For Higher Physics

If you want to buy any of these just post here and I will arrange payment.



#10581 What do you think you will get in the final exam?

Posted by gary on 04 December 2004 - 10:56 AM in Mathematics

It's hard to tell this early on and the exam questions are always really hard so I will wait until the prelim before even having an idea of what I wil get.



#30389 2002 - Written Paper - Q14(a)

Posted by gary on 30 May 2005 - 05:02 PM in Chemistry

Q=It
Q=0.97 c

2I-(aq) ---> I2 (aq) + 2e-

2mol Iodine is deposited by 1 faraday

so 2x96500=193000c

0.97/193000 x 126.9

= 5.025x10 -6 moles



#49711 Books For Sale

Posted by gary on 16 August 2005 - 02:22 PM in Revision and Exams

Past Papers:

Higher History 2000-2005
Higher Mathematics 2000-2005
Higher English 2001-2005

Revision:

Leckie and Leckie Higher Mathematics Course Notes
Leckie and Leckie Questions In Higher Mathematics
Leckie and Leckie Higher Physics Course Notes
Leckie and Leckie Questions In Higher Physics
Leckie and Leckie Questions In Higher Chemistry
Leckie and Leckie Questions In Higher Chemistry
Leckie and Leckie Higher English Course Notes
Hodder Gibson How To Pass Higher Maths
Chemcord Revision Notes For Higher Chemistry
Chemcord Revision Notes For Higher Chemistry
Chemcord Revision Notes For Higher Physics

If you want to buy any of these just post here and I will arrange payment.



#23405 Recurrence Relations Help

Posted by gary on 15 May 2005 - 02:31 PM in Problem Questions

Keep getting the wrong answer to this:

A drug in the body dissipates at the rate of 12% during each 10 minute period from the initial treatment.

If an initial does of 50 units is given how much of the does will be present in a patients boodstream after 1 hour.



#23434 Recurrence Relations Help

Posted by gary on 15 May 2005 - 03:34 PM in Problem Questions

Must have made a mistake in my calculator.

Thanks.



#16991 Circles and tangents

Posted by gary on 26 March 2005 - 08:02 PM in Problem Questions

Would you not just substitute the 6 into the k.

Rearrange the equation x-3y = 6 which would give you x = 3y+6.

Then substitute equation 1 into 2.

Simple from there on the values should work out to 0 if you use the descriminant and equal if you use it the other way.

I don't understand what part b is asking.



#9198 Multiple Choice

Posted by gary on 12 November 2004 - 05:12 PM in Chemistry

I think all schools do them.

I got 11/13
8/13
8/13



#10661 Quadratics Questions

Posted by gary on 05 December 2004 - 01:56 PM in Mathematics

Thank You tongue.gif



#49462 Grade Boundaries 2005

Posted by gary on 15 August 2005 - 07:10 PM in History

Upset I never got an A seeing as it was so low must have got low marks for one of they essays.



#49476 Grade Boundaries 2005

Posted by gary on 15 August 2005 - 07:30 PM in History

I am extremely annoyed biggrin.gif

I always think they mark a lot harder for History in the exams than teachers do.



#9255 Differentiation

Posted by gary on 13 November 2004 - 10:52 PM in Mathematics

The blue triangle electrical company issues a black tool case to each of its employees. For publicity purposes it decides to attack a blue plastic triangle to the outside of each case.

In the diagram the rectangle ABCD represents the outside of the case which measures 40 cm by 30 cm. The triangle within the rectangle represents the blue plastic triangle which is placed so that the lengths of the lines AE and DF are x centimetres and 2x centimetres respectively.

A show that the area S square centimetres of the triangle CEF is given by s(x) = 600 - 30x x x2

(b) Show the interval of values of x on which the function s(x) is defined.

© use calculus to find the greatest and least possible values for the area of triangle cef.


peakland plastics manufacture food containers which have a square base and are cuboid in shape. The sides and base are made of rigid plastic and the lid is made of flexible plastic. the company decide to add a new size of container to this range. it is to have a volume of 4000 cubic centimetres.

(a) if x centimetres is the length of each edge of the base of this container. show that the total area h centimetres of the rigid plastic used is given by

h = x2 + 16000/x

(b) find the dimensions of the container which ensure that the minimum possible area of rigid plastic is used.



#10678 Quadratics Questions

Posted by gary on 05 December 2004 - 03:16 PM in Mathematics

I know you are probably right but when I do the differentiation I get

-x(^2) - 4x + 1.

I'm still confused with the first question this is how I have done it:

-1 ( x(^2) - 50x - 475)
-1 ( (x-25)squared - 475 - 25(^2)
-1 ( (x-25)squared - 475 - 625)

1100 (x-25)squared

Thanks if you help again I'm just confused by the whole quadratic topic.



#30272 explanations

Posted by gary on 30 May 2005 - 02:26 PM in Chemistry

When you have to show about reactant particles on the adsorbed sites etc. what would the questions ask?



#10683 Quadratics Questions

Posted by gary on 05 December 2004 - 03:51 PM in Mathematics

Thanks I've got it now tongue.gif



#23581 2001 Paper 1 Q. 10

Posted by gary on 16 May 2005 - 10:03 AM in Problem Questions

Help please.



#23646 2001 Paper 1 Q. 10

Posted by gary on 16 May 2005 - 01:34 PM in Problem Questions

Thats for paper 2.



#24933 2002 Winter diet paper 2 Q.10

Posted by gary on 19 May 2005 - 02:11 PM in Problem Questions

I know you use the discriminant for this but I am completely lost with the caculation please help.



#30218 explanations

Posted by gary on 30 May 2005 - 11:59 AM in Chemistry

Definitions.