Science & Mathematics - 4 February 2007

Khafre Pyramid in Egypt – a square pyramid Base measurements
Side = 215 m
Height=145 m

Aon Center, Chicago – a rectangular prism (square base)
Base measurements Side = 40 m
Height=345 m
find the surface area and volume of a prism and a pyramid and also the slant height of the pyramid base area from both
I have this results from the pyramid please correct me showing the work thank you'
this what I have :
dimensions of the base 860 m slant height259.326 base area46225 m^2 lateral area 111510.18 m^2 surface area 157735.18 m^2 volume 20783 m^3
I am a little lost with the prism

2007-02-04 05:38:53 · 3 answers · asked by princess 1 in Mathematics

What could the SA of this cuboid be? There are two different answers. Help appreciated.

2007-02-04 05:38:30 · 2 answers · asked by rosh n 1 in Mathematics

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2007-02-04 05:38:20 · 3 answers · asked by jackie s 1 in Biology

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2007-02-04 05:37:59 · 7 answers · asked by cooljava4ever 1 in Engineering

what is the process in which one strain of bacteria has been changed into another?

2007-02-04 05:36:50 · 1 answers · asked by Joan L 2 in Biology

1. 8y^3+27
2. 27m^3-8

2007-02-04 05:36:33 · 3 answers · asked by D M 1 in Mathematics

3 men went to stay at a motel, the stay in total was $30. They each put in $10. The manager then decided that b/c it was 4 a.m. when they checked in, he would take $5 off the price. He sent his clerk to give them back $5. The clerk said to himself, "they cant split $5 evenly so, I cam going to give them $3 and keep $2 for myself. So if the 3 men each got back a dollar. Thay all spent $27. But if the clerk kept the $2 that would make it $29. Where is the other dollar??? I know 3+2+5. But when you look at the total of what they sepnt and what the clerk kept. Its doesn't make sense. There is an answer, I just cant figure it out. Does anyone know???

2007-02-04 05:34:10 · 6 answers · asked by Anonymous in Mathematics

I have to get my blood drawn today and I was just wondering and I want to be prepared for it

2007-02-04 05:33:55 · 11 answers · asked by Anonymous in Medicine

If A is invertible and 'a' cannot equal zero, then aA is invertible and
(aA)^-1 = 1/a(A^-1)

I'm confused with this question. It doesn't say what small 'a' is supposed to be, is it any number? We are still in the beginning of linear algebra, so I can't use anything too advanced to prove it. I'm not sure where to start.

2007-02-04 05:33:41 · 3 answers · asked by Red Ruby 1 in Mathematics

The waters of the oceans contain many elements in trace amounts. Rubidium, for example, is present at the level of 2.2 nM (1 nM = 10^-9 M).What volume of seawater have to be processed to recover 510 kg of rubidium, assuming that the recovery process was 100% efficient?

2007-02-04 05:29:22 · 2 answers · asked by bollocks 2 in Chemistry

Let say for a level transmitter

2007-02-04 05:29:05 · 5 answers · asked by Lt Khai 1 in Engineering

The four 1.0 g spheres shown in the figure are released simultaneously and allowed to move away from each other.

2007-02-04 05:27:35 · 2 answers · asked by happy 1 in Physics

What are the highest and lowest points in Mckinley county
Do any rivers pass through the county
what are some of the prominent land forms
what makes up the most of the economy
Please answer as many of these questions as you can

2007-02-04 05:26:18 · 1 answers · asked by Drew 1 in Geography

http://www.nysedregents.org/testing/mathre/matharch/mathbtestja04.pdf

click on the site and tell me how to solve # 10

2007-02-04 05:25:29 · 1 answers · asked by what ever ? 2 in Mathematics

2007-02-04 05:23:22 · 2 answers · asked by Anonymous in Biology

help??

2007-02-04 05:21:24 · 6 answers · asked by Xx_Booty_Shakin_Cheerleader_xX 1 in Chemistry

what experiments etc were made to show dna is really our genetic material please answer in as much detail as possiable :D

2007-02-04 05:20:54 · 5 answers · asked by intellectual_mind 2 in Biology

of positive real numbers. Without using words of negation, for each statement write a sentence that expresses its negation.

a)For all xЄA, there is a bЄB such that b>x
b)There is an xЄA such that, for all bЄB, b>x
c)For all x, yЄR, f(x) = f(y) => x=y
d)For all bЄR, there is an xЄR such that f(x)=b
e)For all x, yЄR and all εЄP, there is a δЄP such that |x-y|<δ implies |f(x)-f(y)|<ε
d)For all εЄP, there is a δЄP such that, for all x, yЄR, |x-y|<δ implies |f(x)-f(y)|<ε

Any help on this would be nice!

2007-02-04 05:18:11 · 3 answers · asked by Anonymous in Mathematics

I am working on some problems for one of my classes and I have to convert 2's complement binary to decimal and I am wondering if I did it right.
so the 2 complement binary is 0110, so I know it's a positive number because of the leading term. Then I inverted it, making it 1001 and add 1 getting 1010 and I get 10, but the prof.'s answer says it's 6, but I don't know why, and I don't know where I messed up, or if he did.
Thanks

2007-02-04 05:17:55 · 5 answers · asked by 123SP 1 in Engineering

2007-02-04 05:15:49 · 5 answers · asked by johnbiker7 1 in Engineering

Hi, I am desperately needing some help with these equations.
My goal is to find x and I'm a little lost.
I hope I can explain these well enough that someone knows what I'm talking about.

The first one is:
log3x=2

The second problem looks like:
-6^-3x=-73
(*Note: the '^' is "to the power of"...So it'd be like -6 to the power of -3x...I hope that makes sense!)

Third:
2logbase7 x - logbase7 7=logbase7 7
(This one was really hard to explain. The two is out in front of the log, followed by a base 7 and then an x..minus a log base 7 followed by just a 7...equals..a log base 7, followed by a regular 7...I put a space after the base to indicate that it's not part of the base...Does that make sense?)

The next one is:
logbasen 4=5
(So log base 'n' followed by a 4...equals 5..)

Next is:
logbase5 (x-4)=3
(Okay...a log with a base 5 followed by (x-4) equals 3.)


If anyone could help me out with these problems I would be extremely thankful. I've been struggling to solve these all day.

2007-02-04 05:15:08 · 4 answers · asked by gomhen 2 in Mathematics

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Thanks!

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