Mathematics - 12 August 2007

suppose that the function p=13+45 Ln x represents the % of spam email in the U.S. where x is the number of years after 2000

Carry all calculations to six decimals on each intermediate step when necessary.

a) Use this model to approximate the percentage of spam in the year 2003

thank you

2007-08-12 05:44:25 · 3 answers · asked by quepid622 1

find the domain of the following:

f (t)=4.5e^t


g (x)=log(x+3)


g(x)=2^x


g (t)=ln (t-1)

thank you

2007-08-12 05:40:24 · 3 answers · asked by quepid622 1

2007-08-12 05:31:56 · 26 answers · asked by Anonymous

Say you take the point of origin as 0,0. And you find a point on the graph to be at 7, 2.

How do I determine what angle this is?

Would I use sin y/cos x?
which would be sin 2/cos 7

2007-08-12 05:14:18 · 4 answers · asked by Anonymous

Ok I need help solving the binomial multiplication problem of (x+6)^2. If the answer is x^2+36 please let me know.

2007-08-12 04:55:29 · 12 answers · asked by hoopbredkb24 1

How many ounces equals a pound?

2007-08-12 04:53:41 · 6 answers · asked by chica101 2

The text book I have doesn't clearly explain how the formula can be calculated. Example, if there is a population of 6 and a sample of 3, the answer is 20. Can someone please help explain to me how 20 was derived? Thanks.

2007-08-12 04:51:47 · 2 answers · asked by Daniela 1

I dont get it. the first one the answer is 0<-3....how is that possible...
please solve this for me, step by step...
and explain me how you do this...
thanks..

2007-08-12 04:48:20 · 2 answers · asked by mathneedy 1

In a play area a children's slide is constructed as shown here : http://i16.tinypic.com/4mtuhkk.jpg
(angle at end of slide/ground is 30°, angle at end of stairs/ground is 45°, and the length of the support beam is 2m)

a)What is the EXACT length of the stairs?
b)What is the EXACT length of the slide?

Please show you trig work/steps. thanks =)

2007-08-12 04:42:05 · 4 answers · asked by Anonymous

1.if the size of a baceria colony doubles in 6 hours how long will it take for the number of bacteria to triple?

2. the fourth route of 64 + 9 fourth route of 4 = ?

3. if f(t)=square route of (t^2-36) find all values of t for which f(t) is a real number.

solve f(t)=8

if u can solve any of these please please explain it to me!

2007-08-12 04:36:36 · 1 answers · asked by Anonymous

If y varies directly as the cube of x and y = 30 when x = 2, find x when y = 468.75.

2007-08-12 04:36:00 · 2 answers · asked by Anonymous

(x+y = xy) iff x is not equal to 1.

I need a systematic proof (step-by-step). Thanks a whole bunch!

2007-08-12 04:30:17 · 4 answers · asked by Arch-RF d 1

Please explain if you can thanks

2007-08-12 03:02:02 · 9 answers · asked by Anonymous

Equation: y=(2x-1)/(4x+3) Solve for x.

2007-08-12 02:42:58 · 7 answers · asked by shih rips 6

2007-08-12 02:32:29 · 5 answers · asked by Anonymous

Formula: 1/a + 1/b = 1/f Solve for a.

I know I have to subtract "1/b" to isolate "1/a" but after that, how do I get "a" by itself?

2007-08-12 02:10:51 · 5 answers · asked by shih rips 6

The volume of a sphere is equal to the volume of a right circular cylinder. The diameter of the sphere is equal to the altitude of the cylinder. What must be the base radius of the cylinder?
Pls. show ur solution.
Tnx very much!

2007-08-12 02:06:46 · 4 answers · asked by double B 2

a rectangle of fixed perimeter 36 is rotated around one of its sides, thus sweeping out a figure in the shape of a circular cylinder. what is the maximum possible volume of that cylinder?
the length of 2 sides of the rectangle is 'h' and is also the height of the cylinder.
the length of the other 2 sides is 'r' and also the lenght of the radius of the circular cylinder.

2007-08-12 01:48:37 · 3 answers · asked by Allison 1

Pls help me with this. THANKS!!

1. integral of sin 8x* cos 3x dx

2. integral of sin^3 12x dx

2007-08-12 01:41:43 · 3 answers · asked by Anonymous

I don't really know how to factor this thing! Can anyone please give me the steps on answering it?

2007-08-12 01:16:56 · 6 answers · asked by Chardy 2

If asquared + bsqaured + csquared = 99,
and ab + bc + ac = 35,
find the value of a + b + c.

2007-08-12 00:57:50 · 4 answers · asked by Anonymous