Science & Mathematics - 9 January 2007

I'm just doing a project for school and I'm not sure what they are. Please help?

2007-01-09 12:37:42 · 6 answers · asked by falloutgirl349 1 in Biology

When you divide two fractions, which one do you turn upside down and then multiply?
(e.g: -6mm / 15 divided by 2m" / 5 )

2007-01-09 12:37:17 · 5 answers · asked by -anonimus- 2 in Mathematics

turn a % into a fraction or mixed number (reduce)

(1) 871/2% (2)371/2 % (3)6 1/4 % (4)16 2/3% (5) 831/3

THIS IS MY HOME WORK I GOT THE REST DONE BUT THIS NO MATTER HOW MANY TIMES I TRY IT IS NOT RIGHT PLZ HELP

2007-01-09 12:36:25 · 4 answers · asked by Anonymous in Mathematics

2007-01-09 12:34:40 · 6 answers · asked by LINGO7 1 in Mathematics

Okay I'm sure I know the stuff for the Geometry test tommorow but my teacher is so LAME (really) she wont allow us to use calculators! So I need to know whats the easy way to figure out these pretty basic problems

-7 + 8 =
-7 - 9 =

You know the whole negative times a negative
positive plus a positive (well thats easy at least.)
negative times postive


Can you tell me the rules like a neg and a neg will always equal pos right? Give an example or 2 it would be really helpful

5 stars guarenteed tommorow I need this info ASAP. So please hurry! (Thank you)

2007-01-09 12:34:22 · 5 answers · asked by Anonymous in Mathematics

Yeah i have a BIG test tomorrow and i have no idea what the answer to this question is!! HELP!!!

2007-01-09 12:33:49 · 3 answers · asked by TorBor 1 in Astronomy & Space

2007-01-09 12:33:42 · 14 answers · asked by Anonymous in Geography

Ahmad and Bob want to calculate the height of a tree. They measure the angles of elevation to the top of the tree. The angle of elevation from Bob, who is standing 60 m from the base of the tree, to the top of the tree, is 40˚. The angle of elevation from Ahmad, who is standing 80 m from Bob, is 50˚. The height of the tree is 50 m.

Calculate the angle between Ahmad and Bob.

2007-01-09 12:33:23 · 1 answers · asked by thomasgraham880 1 in Mathematics

i need help plze help me with the element sodium

2007-01-09 12:33:22 · 10 answers · asked by singervv01 1 in Chemistry

i just need to have its bibliography or possiblly background information. basically information gathered from websites and other resources. but the information has to be accurate and it has to make since. don't forget to include its bibliography. and be sureto have straight up information.

2007-01-09 12:32:37 · 3 answers · asked by Anonymous in Botany

2007-01-09 12:32:25 · 4 answers · asked by Babsie 1 in Mathematics

What are some examples of chemical reactions taking place in a recipe...ex. brownie recipe or something?

2007-01-09 12:31:40 · 1 answers · asked by Anonymous in Chemistry

I was asked this the other day in a rather drunken state and i cant figure out the answer! Scientists which believe in the big bang theory state that the universe is expanding. However the universe is described as "the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm." So what is everything expanding in to?

2007-01-09 12:31:03 · 15 answers · asked by Red Zuko 1 in Astronomy & Space

Find three consecutive binomial coefficients in the ratio 1 to 2 to 3. That is,
(k):(k + 1):(k + 2) = 1:2:3

2007-01-09 12:29:59 · 1 answers · asked by ItalianStallion 2 in Mathematics

2007-01-09 12:29:08 · 4 answers · asked by Ms. Hollywood Diva 2 in Biology

2007-01-09 12:27:54 · 10 answers · asked by Ms. Hollywood Diva 2 in Biology

2007-01-09 12:27:38 · 8 answers · asked by humpty1995 1 in Mathematics

2007-01-09 12:27:33 · 10 answers · asked by rennetta_15 1 in Mathematics

2007-01-09 12:27:22 · 3 answers · asked by M Dawg 2 in Engineering

2007-01-09 12:26:50 · 4 answers · asked by markrflaherty 1 in Zoology

wh/en lighting a candle which candle would burn faster. A color candle or a white candle ?

2007-01-09 12:26:28 · 4 answers · asked by yoyo 1 in Other - Science

2007-01-09 12:25:42 · 3 answers · asked by bre 1 in Mathematics

also, how do you get to it.

2007-01-09 12:25:30 · 3 answers · asked by Anonymous in Mathematics

can someone explain me what are isomers ???
and can someon ehlp me to find all isomers of C5H2 ???
Thank you all

2007-01-09 12:23:59 · 2 answers · asked by guddi_bhalodia 2 in Chemistry

Find the minimum distance from the point (3,2) to the curve y = x² + 2.

I know how to find the distance from a point to a line. The distance from the point to the curve should be the same as the distance from the point to the tangent of the curve at the nearest point on the curve. But since I don’t know either the nearest point on the curve or the slope of the curve at that point, I am not sure how to proceed.

2007-01-09 12:22:52 · 4 answers · asked by Northstar 7 in Mathematics

....traveling 65 mph How long will it take before they are 180 miles apart??

and then the teacher included a hint, yet it made me even more confused..the only thing i think i get is that you have make an equation and solve it ? yet how do i even start one ???

Hint: The time for both cars is the same and can be represented by "t." The total distance is 180 miles. The distance = (rate)(time). If you add the (rate)(time) of the first vehicle to the (rate)(time) of the second vehicle, that will equal the total distance of 180 miles. Since you only have one unknown (t), you only need one equation.

2007-01-09 12:21:51 · 7 answers · asked by Deanna 2 in Mathematics

how would the clover benifit the lawn

2007-01-09 12:19:54 · 2 answers · asked by Rob P 1 in Biology

I have a measurement device that I want to calibrate. From observation, it appears that a quadratic cal equation will be needed, i.e., y = ax^2 + bx + c where y is the value to be displayed, x is the raw value produced by the device, and a, b, & c are the calibration coefficients. The plan is to simultaneously take 'n' different measurements from the device (i.e., a list of 'x' values) and from a calibration standard (i.e., a list of 'y' values) that are approximately uniformly distributed over the device measurement range and then to use least-squares regression to compute a, b, & c. The minimum value of 'n' is clearly 3. Intuitively, increasing 'n' will reduce the error of the calibration process, however I'm hoping to get some quantitative guidance in choosing 'n'.

2007-01-09 12:19:52 · 2 answers · asked by Calli Braytor 1 in Engineering

The right triangle with sides of length 5, 12, and 13 has the property that its area is equal to its perimeter. What is a another triangle with sides that are integers that also has this property?

2007-01-09 12:18:12 · 4 answers · asked by ItalianStallion 2 in Mathematics

2007-01-09 12:17:36 · 5 answers · asked by Boston Boy 2 in Mathematics