Mathematics - 6 August 2007

2)How long it will take for an investment of 3000 dollars to double in value if the interest rate is 7 percent per year, compounded continuously?
Your answer is t=____ years.

3)For a pole-vaulter in training, the height the athelete will be able to pole-vault after t months of training is given by
H(t)=20-15e^-0.02t

After how many months will she be able to vault 15 ft?

_____________months

2007-08-06 16:53:51 · 3 answers · asked by Anonymous

2007-08-06 16:46:37 · 4 answers · asked by swtaznbj34 2

2007-08-06 16:45:48 · 3 answers · asked by swtaznbj34 2

A clarinet acts as a closed-ended air column. If its bottom note has a frequency of 130 Hz, how long is the column?

2007-08-06 16:29:46 · 1 answers · asked by Anonymous

The volume of a cube with edge of length 2 meters is what percent of the volume of a cube with edge of length 4 meters?

A) 12 1/2%

B) 20%

C) 25%

D) 40%

E) 50%

2007-08-06 15:51:44 · 14 answers · asked by Anonymous

Find domain and range of the function
f(x)=-3x^2-15x+12

S varies jointly as p and q. If p= 13 and q= 15, then S = 80. Write S as a function of p and q.

S=?

2007-08-06 15:36:46 · 3 answers · asked by Anonymous

How would I write that as an equation? I'm confused!

2007-08-06 15:26:56 · 8 answers · asked by Anonymous

I've been working on this for a few days.

r(x)=5sinx, s(x)=3cos2x

both have the domain of [0, 2pi).

I tried to make the two functions equal to each other and I got so far as :

5sinx=3cos2x

5sinx=3(1-2sin²x)

(5/3)sinx=1-2sin²x

(5/3)sinx=(1-sin²x) - sin²x

(5/3)sinx=cos²x - sin²x

I am probably doing this wrong... any tips and next step suggestions, please?

2007-08-06 15:26:33 · 6 answers · asked by Anonymous

2007-08-06 15:25:14 · 3 answers · asked by Anonymous

a) 3i
b) -10
c) 10i
d) 7i

2007-08-06 15:23:43 · 11 answers · asked by Anonymous

2007-08-06 15:22:26 · 4 answers · asked by Anonymous

Explain the difference between a logarithms of a product and the product of logarithms and give examples of each.

2007-08-06 15:12:52 · 3 answers · asked by CollegeYearRound 1

2007-08-06 15:12:41 · 2 answers · asked by Anonymous

log2x = log 4

2007-08-06 15:10:12 · 2 answers · asked by CollegeYearRound 1

How do I solve this problem?

x^2 + 2x - 16y^2 - 15 = 0

Thanks,

2007-08-06 15:08:28 · 2 answers · asked by thachick103 1

equalling $30 dollars, and the desk clerk later realizes he should have only charged $25 total. He gave the bellman $5.00 to refund them, but the bellman cheated pocketing $3.00 and only gave them a refund of $1.00 each, keeping $2.00. So $10 less $1 equals $9. Three times $9 is $27. $27 plus the $2 the bellman stoled equals $29. WHAT HAPPENED TO THE OTHER DOLLAR?

2007-08-06 15:05:54 · 10 answers · asked by ABIGAIL 2

How can you graph this?
y = [x]
(greatest integer function, do not connect the steps)
I really don't know how to graph this. Can you give me an example?
Thank you so much. I appreciated it.

2007-08-06 14:59:43 · 4 answers · asked by peopleme 1

Is it adj over hyp?

What are the rest of the trig functions?

2007-08-06 14:34:50 · 2 answers · asked by Anonymous

each. give any approximate value to the nearest minute only. 3). sin 2 theta =sqrt 3/2 4). sin 2x -cos x =0 5). sin (2x - 10deg.)= 1/2 6). cos2x- sin^2 x/2 +3/4 =0 7). sin^2 theta = cos^2 theta + 1/2 8). cos4x = sin 2x.

2007-08-06 14:21:12 · 1 answers · asked by Anonymous

If f (x) = x - 1, g(x) = x + 1, and N = {1, 2, 3, 4,. . .} is the domain of each function, find the simplest possible expression for the following.

(a) f (g(x))

(b) g(f(x))

2007-08-06 14:12:30 · 5 answers · asked by Anonymous

Given the function rules and domains, find the associated ranges.

(a) f (x) = 2x + 3, domain = {0, 1, 2}

(b) f (x) = 0, domain = {0, 1, 2}

2007-08-06 14:10:15 · 3 answers · asked by Chris 1

Use the binomial theorem to prove:
http://img172.imageshack.us/img172/7686/ilc89pr2.jpg

Prove: http://img505.imageshack.us/img505/8370/ilc90blk3.jpg, 0 ≤ j ≤ n

2007-08-06 14:08:22 · 1 answers · asked by Tina 2

I've tried over and over but I just can't get it.
The first one is x^2+3x+1.
The second one is x^6-2x^5+7x^4.

2007-08-06 14:02:03 · 2 answers · asked by MandalorianSquid 2

A. d= vt, solve for v B. H= bC^2RT, solve for R C. S= squareroot 32(d+kh) solve for h

2007-08-06 13:58:24 · 1 answers · asked by Anonymous

A survey was made of 200 students to study their use of the public library system. The findings were as follows:

60 used the Reader’s Guide.
28 used both the card catalog and the information booth.
68 used the information booth.
83 did not use the library.
43 used only the card catalog.

Explain how the above information can be used to conclude that some students must use both the information booth and the Reader’s Guide.

2007-08-06 13:56:50 · 2 answers · asked by Chase L 1

2007-08-06 13:53:08 · 3 answers · asked by Anonymous

2007-08-06 13:50:44 · 6 answers · asked by Ash 1

Here's the question. I'm having trouble with it.
Divide.
2x^2y-6xy^2+12xy / 2xy

Can you help me? Thanks, if you can.
:-D

2007-08-06 13:48:21 · 7 answers · asked by Nerds Rule! 6

2007-08-06 13:29:47 · 8 answers · asked by sportsguy367 1

1+3x/5-2x

2007-08-06 13:22:21 · 3 answers · asked by deadman 2