Mathematics - 13 September 2007

Math work help homework

2007-09-13 12:43:54 · 11 answers · asked by Just me 2

Tom won 100,000 dollars in the lottery. he invested part of the money in real estate with an annual return of 5%, and another part in a money market account at 4.5% interest. He invested the rest, which amounted to $20,000 less than the sum of the other 2 parts, in certificates of deposit that pay 3.75%. If the annual interest on the money was $4450, how much was invested at each rate?

2007-09-13 12:33:03 · 4 answers · asked by Adam M 2

What volume would be occupied by a piece of aluminum (d=2.70g/cm^3) weighing 85g?



Thanks SOOO much your help im really confused on this problem :)

2007-09-13 12:29:42 · 6 answers · asked by CrimsonRider 1

a cylinder is inscribed inside a sphere with radius R. let x=height of cylinder. write a formila for the volume of the cylinder as a function of x and that includes R in some way. What is the domain of V(x) and graph V(x) when R=3

2007-09-13 12:28:48 · 1 answers · asked by Harmlessly Roaming 1

lim (x --> infinity) (10x^2 + 25x + 1)/(x^4 - 8)

2007-09-13 12:25:19 · 1 answers · asked by pixiestix 1

A. 600 C. 150

B. 25 D. 24

2007-09-13 12:21:22 · 7 answers · asked by Luvvly W 1

2007-09-13 12:21:19 · 3 answers · asked by lildude3216 2

2007-09-13 12:18:26 · 10 answers · asked by Anonymous

If I have a 5"x5" box and I want there to be 3 rows of small boxes and 3 columns of small boxes, what would be the height and width of the small boxes?

Thanks

2007-09-13 12:15:45 · 5 answers · asked by Anonymous

A cylinder with height 15 has a total surface area that is twice the area of a circle whose radius is 6 more than the radius of the cylinder. What is the radius of the cylinder?


I just need the equation, and I will solve it on my own.

2007-09-13 12:14:43 · 3 answers · asked by that's funny 3

Explain why the equation cosx=x has at least one solution. (without using a graph)

2007-09-13 12:11:10 · 1 answers · asked by Lois C 1

how do you simplify this problem?

2007-09-13 12:09:59 · 3 answers · asked by iwonder 4

im kinda confused, i have to convert an exponent to exponential form if its in radical form or radical form if its it exponetion, the problem is: 16^(5/4) =32

ps im sorry about the wierd symbols, i dont know how to make it look nice like it does in my math book

2007-09-13 12:08:53 · 2 answers · asked by chuckt 3

what is the smallest positive integer that can be expressed as the sum of nine consecutive integers, the sum of ten consecutive integers and the sum of eleven consecutive integers?

2007-09-13 12:08:53 · 2 answers · asked by Anonymous

2007-09-13 12:07:10 · 6 answers · asked by Anonymous

Find the domain of the function:
f(x)= (5-x)/ (2x^2 +5x -12)

(five minus x, divided by two x squared plus five x minus 12)

2007-09-13 11:59:43 · 1 answers · asked by Aimee R 1

prove sin4x/sinx = 4cosxcos2x

show all work please.

your help is greatly appreciated.

2007-09-13 11:56:57 · 2 answers · asked by gordonfreak 3

Hi. I have to finish my introduction to an investigation I will be doing, finding the relationship between heights and weights amongst school pupils..

However I am now chosing my second hypothesis (e.g 16 yr old males are taller and heavier than 12 year old females).. But I have to incorporate advanced statistical methods into it, to get the higher grade.. What should I say??

Thanks in advance

2007-09-13 11:54:47 · 2 answers · asked by Anonymous

in math when your doing multiplication if its a negative times a postive will it become a postive

also what are the rules for all of that with postives and negatives

thanks

2007-09-13 11:53:57 · 6 answers · asked by Anonymous

896, 3687, 749, 34448, 836,

What is the 20th number in the sequence? This has been driving me Insane

2007-09-13 11:52:33 · 3 answers · asked by Morgan 3

how do you solve this and put it on a number line


-5
----t > 24 how to you solve that its 5/8 t >24 please help and how do you put it on a number line
8

2007-09-13 11:50:46 · 2 answers · asked by cutie2007 2

Evaluate the fuctions at the given values of the idenpendant variables. Simplify the results.

f(x) = 1 / Sqrrt(x-1)


f(x) - f(2)
-----------
x - 2

Please give a detailed explanation.
Thanks :)

2007-09-13 11:44:39 · 2 answers · asked by Matthew K 2

ODE solution

2007-09-13 11:43:13 · 2 answers · asked by mikey6542 1

2007-09-13 11:42:09 · 7 answers · asked by 2 cute 4 u 1

I understand how to do the basic common denominator problems like the last one:

5/(x+2)-9/(x+2)

But the real problem is when the numbers added to x are different, that makes the problem more complex like this one right here:

3/(x+2)=2/(x+5)

What would be the first few steps in solving this problem?
(Please don't solve the whole thing, just show how to get rid of the fractioned x)

thanks again!

2007-09-13 11:41:15 · 2 answers · asked by darthchaluupa 2

A. Radius = 15m

B. Diametre = 7m

2007-09-13 11:40:01 · 4 answers · asked by Anonymous

I am having trouble with standard notation and product form. Please explain and show me. I'll vote you for best answer.

2007-09-13 11:38:02 · 4 answers · asked by Anonymous

If anyone could explain how the following is done, it would be greatly appreciated!

Suppose that there is a tennis tournament with 32 players. Players are matched in a completely random manner, and we assume that each player always has probability 1/2 of winning a match. What is the probability that two given players meet each other during the tournament?

2007-09-13 11:36:26 · 2 answers · asked by Anonymous

Problem number 1: A number consists of two digits followed by the digit 4. A second number starts with the digit 4 followed by the same two digits as used in the first number.

The equation for this problem would be 10x + 4 (first number) and (400 + x) - 400 (second number).

So the question is, if the second number is as much greater than 400 as the the first number is smaller than 400, what is the first number?

Problem number 2: Sea water contains 5% of salt (by weight). How many kg of fresh water should be added to 40 kg of sea water for the latter to contain 2% salt?

Problem 3: The length of a rectangle is increased by 20% while its with by 10%. What percentage increase is there in its area?

Problem 4: Emily wishes to mix two types of tea. Type A costs $0.36 per kg while type B costs $0.50 per kg. She then sells the mixture at $0.46 per kg and makes a profit of 20% of the total cost. What percentage of the total mixture is made up of type A?

2007-09-13 11:28:12 · 3 answers · asked by Juh-cel. 1

can u please help w/ some math? oh and can u show how u did it so i understand? thx.
btw ^ means exponent/ to the power of. i think..

1. 225/(-3)(-5) = ?

2. -2 x -6 + 4 x -5^2 = ?

3. 2/5 divided by - 1/2 = ?

4. 3/4 / (- 3/7) = ?

thats all! thanks and remember-10 points =)

2007-09-13 11:24:45 · 4 answers · asked by Anonymous