Mathematics - 8 September 2007

dy/dx = 2/5sin(2x)e^cos x y^2 (y > 0),

y = 1 when x = 0,

giving the solution in explicit form.

2007-09-08 23:33:27 · 2 answers · asked by Niall R 1

2007-09-08 23:23:57 · 3 answers · asked by Niall R 1

Can someone help me express 675 p.p.b. and 1700 p.p.b. as fractions and then as numbers in scientific notation and show reasoning.

Also what is the percentage change between the two figures above and again please show reasoning.

Thanks very much. I am no good at this sort of thing

2007-09-08 23:23:33 · 2 answers · asked by Rachel 1

2x+3y= 14
3x-4y= 4

2007-09-08 23:20:08 · 6 answers · asked by ali k 1

? how do you defferentiate step by step

2007-09-08 23:12:48 · 3 answers · asked by Anonymous

arrange these in order of size, smallest first:
12.01832 12.147 12.56 12.8 12.901 12.0087 12.98 12.01

2007-09-08 22:54:34 · 6 answers · asked by LAURaaa 1

I generally find that teachers do not explain the concept of Derivetive and its theory properly.The students solve the problems blindly by applying formulae or by applying the first principle.Can anybody fill this gap please for a better understanding of the concept?

2007-09-08 22:44:48 · 3 answers · asked by Anonymous

???

2007-09-08 22:29:53 · 1 answers · asked by Anonymous

8r^2-3rs+10s^2

2007-09-08 22:14:09 · 2 answers · asked by MoSsiE 2

Be as detailed as possible...I'm not understanding how we get 108.

2007-09-08 21:45:19 · 2 answers · asked by gatortheone 1

xy < 0

does anyone know which quadrant it would lie in? and can u show work or proof to support it?

2007-09-08 21:39:39 · 4 answers · asked by Alexis's Love Potion #9 4

help plzz

2007-09-08 21:31:31 · 7 answers · asked by loving_you_4ever 2

Example:
1st day: 1 cent
2nd day: 2 cents
3rd day: 4 cents
4th day: 8 cents
5th day: 16 cents
6th day: 32 cents
and so on and so forth for a period of 60 days?

You might do the math, and be really surprised just how much money you would be earning in 60 days using this formular!

So, would you still be willing to hire me?

PS. This isn't "fuzzy math" people, but it is very interesting!

Thank you,

2007-09-08 21:01:33 · 8 answers · asked by Anonymous

write down the expansion by binomial theorem of [3x-y/2]^4. By giving x and y suitable values ,deduce the value of (29.5)^4 .

2007-09-08 20:57:47 · 2 answers · asked by daisy 1

2 logx-log(x+1)=log4-log3

Can someone solve this?

Thanks.

2007-09-08 20:33:18 · 4 answers · asked by Rosie 3

5/4x60

2007-09-08 20:16:34 · 13 answers · asked by Anonymous

Prove that [ (1 - sin x) / (1 + sin x) ]^1/2 = sec x - tan x when x is acute.
(Please start from LHS and without altering the equation on RHS)

Why is the restriction on x necessary?

Thanks in advance!

2007-09-08 20:12:48 · 2 answers · asked by N.y.Rych 1

Please show how you got the answer.

2007-09-08 20:05:00 · 10 answers · asked by Anonymous

a) 2x*2+5x+2
b)2x*2-10x+12
c)ac+ad+bc+bd

thank you for all your help

2007-09-08 18:12:39 · 4 answers · asked by MB 4

5y-(2-3y)=54

3x-4+8x + 3=32

7x-6(11-2x)=10

6(x-2)=2(9-2x)

8x-3(6+x)=5x+4

2007-09-08 18:12:14 · 7 answers · asked by Anonymous

A) How far below an initial straight - line path will a projectile fall in one second?
B) Does your answer depend on the angle of launch or on the initial speed of the projectile? Defend your answer.


When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:50:20 · 3 answers · asked by Anonymous

2007-09-08 17:45:50 · 1 answers · asked by Ase 2

by using multiplication, addition, subtraction, OR division! Please Reply! Today!

2007-09-08 17:43:44 · 7 answers · asked by Naruto Uzumaki 2

If x = 1

how can it equal x = 0.9 recurring?

2007-09-08 17:42:55 · 3 answers · asked by Anonymous

the answer is f(x)=-29+12n+n^2. but I don't understand how they got that. Please include steps.

2007-09-08 17:37:59 · 3 answers · asked by Angela T 1

Write an equation that can be used to solve the following problem: The cubic function C(t) = 1.054t3 + 28.0729t2 + 238.50t + 1122.6 can be used to model carbon emission in millions of metric tons from consumption of solid fuels (e.g. coal and wood) in the U.S. in the year 2000 + t. According to the model, in which year(s) will (or was) carbon emission from the consumption of solid fuels equal to 900 million metric tons.

I put:
900 = 1.054(t)^3+28.0729(t)^2+238.50(t)+1122.6

But it was marked wrong. Where did I go wrong?

2007-09-08 17:22:29 · 2 answers · asked by Shoe Girl 2

A function f: M-->N is open if for any open subset A of M, f(A) is an open subset of N.

2007-09-08 17:22:10 · 2 answers · asked by guyava99 2

I received the answer 7/2 units is this rite?

2007-09-08 17:21:48 · 3 answers · asked by Richard Boolean 2

It is related to the AGM Inequality and is supposed to be used when doing this. The AGM inequality is

2xy <= x^2 + y^2

2007-09-08 17:20:11 · 2 answers · asked by Anonymous

Z-X=22

Y/X=7

Y+Z=70

what do X, Y, and Z equal?

2007-09-08 17:16:43 · 10 answers · asked by Bon Jovi Rocks Hard 4