Science & Mathematics - 1 November 2007

Hi. I need help with math homework.
Question is:
1.Is 14,949 a reasonable answer for 3 x 4,983? Estimate a finding range.
2. Is 6,704 a reasonable answer for 856 x 9?
Estimate a finding range.
Pls help,
Thanks again

2007-11-01 17:55:51 · 2 answers · asked by havequestion 1 in Mathematics

can some body help me?
the question is
i is a zero of y= x^4 -4x³ + 2x² -4x + 1
list all the zeros?

please explain . any help is appreciated. thnx~! ^-^

2007-11-01 17:52:04 · 2 answers · asked by John 1 in Mathematics

2007-11-01 17:51:29 · 5 answers · asked by rath 5 in Biology

A rectangular garden next to a building is to be fenced on three sides. Fencing for the side parallel to the building costs $40 per foot, and material for the other two sides costs $40 per foot. If $2200 is to be spent on fencing, what are the dimensions of the garden with the largest possible area?

The parallel side =?
The other two sides =?

2007-11-01 17:48:27 · 2 answers · asked by Anonymous in Mathematics

how long does it take for vicodin to clear out of your urine?

2007-11-01 17:45:20 · 3 answers · asked by enewshan 2 in Medicine

The sum of the height h and the base b of a triangle is 58. What height and base will produce a triangle of maximum area?

h=?
b=?

2007-11-01 17:44:34 · 4 answers · asked by Anonymous in Mathematics

The airspeed of a plane is 420km/h and its heading is 140 degrees. A wind of 40km/h is blowing on a bearing of 40 degrees. Determine the plane's resultant speed relative to the ground and the bearing of its true course.

2007-11-01 17:38:50 · 2 answers · asked by o0griff0o 2 in Mathematics

2007-11-01 17:35:43 · 4 answers · asked by meeme821 1 in Physics

it's all in the question lol

2007-11-01 17:35:31 · 4 answers · asked by J 1 in Biology

The forces acting on a 2.8kg mass are F1=F1xi-F1yj and F2=F2xi+F2yj where F1x=3N, F1y=8N, and F2x=6N, and F2y=2N and I have to find the magnitude a of the acceleration of the particle. We were told to use a=F1x+F2x/m i + -F1y+F2y/m j, then a=axi+ayj so what I did was 3+6/2.8 + -8+2/2.8 but I got the answer wrong if you know could you help me out please.
There was an example and it was that a 2kg mass is acted on by four forces F1 is 10 N due E, F2 is 8 N due N, F3 is 16 N due S, and F4 is 1 N due W. And the answer for the magnitude of the acceleration was 6.02 but I don't get how they got it so I don't get the other question.

2007-11-01 17:35:17 · 1 answers · asked by glance 3 in Physics

if f(x)= e^2x - 5e^x + 6=0 has 2 solutions,
what is the smaller solution?
what is the larger solution?

2007-11-01 17:32:08 · 5 answers · asked by Anonymous in Mathematics

What process in our body produces carbon dioxide? How does exercise affect this process?

(I think Krebs Cycle but I'm not sure why)
~Thanks.

2007-11-01 17:31:01 · 2 answers · asked by noclue 2 in Biology

"allternative walling materials for multi story load bearing construction"
frm which web sites can i get information abt that title??

2007-11-01 17:30:01 · 1 answers · asked by B G 1 in Engineering

A woman with mass 50.0 kg is standing on the rim of a large disk that is rotating at 0.500 rad/s about an axis perpendicular to it through its center. The disk has a mass of 110 kg and a radius of 4.00 m.

Calculate the magnitude of the total angular momentum of the woman-plus-disk system, assuming that you can treat the woman as a point.

2007-11-01 17:29:39 · 1 answers · asked by ! 2 in Physics

An electroscope is a simple device consisting of a metal ball that is attached by a conductor to two thin leaves of metal foil protected from air disturbances in a jar. When the ball is touched by a charged body, the leaves of foil that normally hang straight down spread apart. WHY???

2007-11-01 17:29:15 · 1 answers · asked by Anonymous in Physics

2007-11-01 17:28:15 · 4 answers · asked by hlc25895 1 in Physics

Of the following substances, which one is NOT expected to dissolve in water?
1. Ca(OH)2
2. C7H16
3. CH3OH
4. C2H5OH
5. HNO3
6. C6H12O6

2007-11-01 17:27:18 · 5 answers · asked by Anonymous in Chemistry

Which of the following alcohols would be the least miscible with water?
1. propanol (CH3CH2CH2OH)
2. pentanol (CH3CH2CH2CH2CH2OH)
3. ethanol (CH3CH2OH)
4. methanol (CH3OH)
5. hexanol (CH3CH2CH2CH2CH2CH2OH)

2007-11-01 17:26:06 · 2 answers · asked by Anonymous in Chemistry

Suppose you contribute $70 per month into a fund that earns 6.15% annual interest. What is the value of your investment after 22 years?

2007-11-01 17:26:05 · 8 answers · asked by QT Patuty 2 in Mathematics

what does this mean......c

2007-11-01 17:24:36 · 1 answers · asked by S i r i 1 in Medicine

Scientists like Stephen Hawking have been talking about multiple universes in other states. Should there be a name for our Universe to distinguish the other ones? If so, what should the name be?

2007-11-01 17:20:37 · 14 answers · asked by nhk_5 2 in Astronomy & Space

I need help with my calculation. I'm not so sure whether i'm doing this correctly or not.
Well...i start with
SW△T(unknown metal)= SW△T(H2O) + C△T(calorimeter)
I need to find the specific heat of the unknown metal.
data I've collected from the exp are as follows:
△T of H2O in calorimeter
mass of unknown metal
mass of water used
boiling water temperature
Now..my question is where do i use the temperature of the boiling water??
For C△T, I've specific heat of calorimeter *△T in calorimeter
For SW△T(H2O), specific heat of H2O*mass of H2O used*△T(but I don't whether I should use △T of H2O in cal or boiling temperature of H2O)
Finally, SW△T(metal), mass of metal*△T(I was thinking of using △T of H2O in calorimeter since temp of H2O=temp of metal) So, please let me know which one I should use and if what I've come up with is correct. And, no disrespectful answers. Thank you!!!

2007-11-01 17:20:00 · 1 answers · asked by aji 3 in Chemistry

i know that it has 1 and 100 0's after it but i dont know how to put it into scientific notation i think its 10 x 100 but im not sure

2007-11-01 17:18:38 · 3 answers · asked by Natedogg 1 in Mathematics

2007-11-01 17:17:32 · 6 answers · asked by Anonymous in Mathematics

1. A compound has a molar mass of 80.0g has molecules that are tetratomic.
A.How many total atoms are present in a 120.0g sample of the compound?
B. How many molecules are present in a 40.0g sample of the compound?

2.what mass, in grams, of nickel is present in a 25.00g sample of nickel ore that is 77.25% NiS? Assume that impurities present do not contain any nickel.

2007-11-01 17:12:18 · 1 answers · asked by Anonymous in Chemistry

2007-11-01 17:10:16 · 5 answers · asked by orldoming 1 in Astronomy & Space

A 10*10 cm square card is folded, a circle with radius 1 cm is placed so that it is entirely on the square. If the upper square is marked yellow, the lower part is marked red. What is the probability that the circle lies entirely in the red part?

2007-11-01 17:09:08 · 4 answers · asked by Anonymous in Mathematics

2007-11-01 17:06:31 · 1 answers · asked by anna k 1 in Mathematics

okay in a closed ecosystem, how do plants get the nutrients they need?

2007-11-01 17:05:31 · 4 answers · asked by sweet_teeq 1 in Botany

i got both prescriptions but i dont remember if i can take them both at the same time

2007-11-01 17:04:12 · 11 answers · asked by Lovely 4 in Medicine