Science & Mathematics - 2 December 2007

x^2-2x-15=0

2007-12-02 04:26:20 · 6 answers · asked by Anonymous in Mathematics

2007-12-02 04:24:14 · 2 answers · asked by L Q 2 in Earth Sciences & Geology

2007-12-02 04:24:02 · 2 answers · asked by Anonymous in Physics

thanks

2007-12-02 04:21:34 · 14 answers · asked by Dalin243 2 in Earth Sciences & Geology

:P. I have ALWAYS found penguins as my fave animal. Except, I really havent found out which was the first species. Could someone help me? I would like to know. Thank you so much!!!

2007-12-02 04:21:29 · 2 answers · asked by Chasiee 2 in Zoology

2007-12-02 04:20:34 · 32 answers · asked by Anonymous in Zoology

The circular blade on a saw has a diameter of 7.5 inches and rotates at 2400 revolutions per minute.

A.) Find the angular speed in radians per second.
B.) Find the linear speed in of the saw teeth (in feet per second) as they contact the wood being cut.

2007-12-02 04:19:57 · 3 answers · asked by Anonymous in Mathematics

Do a complete analysis of the percent of seeds infected by the beetle. Include a 90% confidence interval for the mean percent infected in the population of all velvetleaf plants.
Seeds Infected Percent 2450 2504 2114 1110 2137 135 101 76 24 121
5.5 4.0 3.6 2.2 5.7
8015 1623 1531 2008 1716 721 863 1136 2819
189 31 44 73 12 27 40 41 79
2.4 1.9 2.9 3.6 0.7 3.7 4.6 3.6 2.8

1911 2101 1051 218 1711 164 2228 363 5973 1050
82 85 42 0 64 7 156 31 240 91
4.3 4.0 4.0 0.0 3.7 4.3 7.0 8.5 4.0 8.7

1961 1809 130 880
137 92 5 23
7.0 5.1 3.8 2.6

2007-12-02 04:18:57 · 2 answers · asked by adrianterrellhogan 1 in Mathematics

f(0)=4
f(6)=0
f(x)<0 if x<2 or x>4
f '(2) does not exist
f ' (4)=0
f ' (x)>0 if 2 f " (x)<0 if x can not equal 2

2007-12-02 04:16:45 · 2 answers · asked by issy m 1 in Mathematics

im supposed to analyze the zeroes and use decartes rule of signs to find all the possibilities??

P(x) = -5x^4 + x^3 + 2x^2 - 1

P(x) = 2x^5 + 7x^3 + 6x^2 - 2

2007-12-02 04:11:33 · 8 answers · asked by Zack A 1 in Mathematics

2007-12-02 04:11:20 · 1 answers · asked by Nicholas 1 in Mathematics

The sentence was to help remember the planets in our solar system...I remember some of it but not all of it...What i remember is My Very Educated Mother Just and thats it....well thanks to anyone that can help

2007-12-02 04:10:31 · 11 answers · asked by LUCKYGIRL 3 in Astronomy & Space

ok if if acceleration is 1 m/s squared and mass is 0.1 kg what it force? and if acceleration is 1 m/s squared and force is 0.2 N what is mass??

please show how you got it!

2007-12-02 04:10:09 · 4 answers · asked by heyjude 3 in Mathematics

I want to know how the world map was drawn hundreds of years ago before people could fly. Esp places like siberia and those regions which were hard to cross etc. I can't figure out how they knew to draw the coastlines etc.

2007-12-02 04:04:57 · 5 answers · asked by highrevs 1 in Geography

Imagine an object with charge Q moving along the ground with speed v through a uniform upward magnetic field of strength B. There is a force of strength QvB on the charged particle. Now imagine an observer moving at the same velocity as the particle. To that observer, v=0. But according to Newton and Galileo, the particle must experience the same force F as before. How can this be? The moving observer sees v=0, so can there be a magnetic force? If not, what kinds of forces can there be instead? If yes, how do you resolve the velocity problem?

2007-12-02 04:03:05 · 5 answers · asked by never_too_clever 1 in Physics

that is how do they fly without visual assistance and without going off course even in night with very low visibility and reach
at the exact destination airport what equipment&technology they use.is it posssible to reach the destination without these equipment

2007-12-02 04:03:04 · 6 answers · asked by dummy 1 in Astronomy & Space

"An arête is a thin, almost knife-like, ridge of rock which is typically formed when two glaciers erode parallel U-shaped valleys. The arête is a thin ridge of rock that is left separating the two valleys. Arêtes can also form when two glacial cirques erode headwards towards one another, although frequently this results in a saddle-shaped pass, called a col. The edge is then sharpened by freeze-thaw weathering. The word "arête" is actually French for fishbone; similar features in the Alps are described with the German equivalent term Grat or Kamm (comb)." WIKI. CAN SOME ONE FIND MORE INFO I CAN"T FIND ANY MORE...

2007-12-02 04:02:17 · 1 answers · asked by Anonymous in Earth Sciences & Geology

A triangle with the following vertices: (-5, 7), (5, 4), (7, -8). I know this is extremely easy, but I simply forgot the procedure. Help?

2007-12-02 04:00:51 · 3 answers · asked by wrongnumber 1 in Mathematics

Uranium (92 protons) decays by emitting an alpha particle and two beta particles; which element is produced after those three decays?

2007-12-02 04:00:42 · 3 answers · asked by A M 2 in Physics

2007-12-02 03:57:52 · 6 answers · asked by Anonymous in Physics

I do not understand how to find the b value....So far I have a center of (4, -2) a=6... please help.

2007-12-02 03:57:12 · 1 answers · asked by jinaan 1 in Mathematics

real rate of interest = effective rate of interest - inflation rate

inflation rate = 31%

rate of interest = 25.6%

effective rate of interest = (1 + r/n)^n - 1

= (1 + (.256/12)^12 = 28.83%

real rate of interest = 28.83 - 31 = - 2.17%

would that be correct?

2007-12-02 03:57:02 · 1 answers · asked by Mathema-what?! 1 in Mathematics

If 2 metal balls each have a charge of -10^-6 C and the repulsive force between them is 1 N, how far apart are they?

2007-12-02 03:56:06 · 2 answers · asked by Anonymous in Physics

1) You are ordering t-shirts from online which cost $7.00 each. Your shipping cost is $4.50 and your purchase total is $25.50. Let t be the number of t-shirts ordered. Which equation models this situation?

2) How many t-shirts were ordered in question #1?

3) Solve the equation 4 - 2(x - 7) = -12 for x.

4) Solve the equation 3(2x + 1) = 2x - 9 for x

5) One-on-One Gym charges $50 initiation fee and $30 per month. Really-Fit Gym charges $75 initiation fee and $25 per month. For what number of months (m) is the cost the same using the equation 50+30m = 75+25m?

2007-12-02 03:55:17 · 7 answers · asked by Anonymous in Mathematics

I had acquired my newt from nature, and therefore I speculate that he may be experiencing the instinct to "hibernate" due to the frigid temperature. This has occurred previously in time with a turtle that I had acquired from nature as well, and it had begun to consume what I had supplied it with subsequent to the late autumn/winter months yet had not succumbed to the usual slumber that hibernation is characterized by. My newt does not appear to be of unsatisfactory health, although when I attempt to feed him he abruptly thrusts his head in the opposite direction and closes his eyes in aversion. He is disinclined to eat, and has not done so for weeks. Surely I am concerned! He has been within my possession for quite a while, although the duration has not been extensive. He is content with his environment, and particularly enjoys a wooden log, seldom acknowledging other supplies. He demonstrates the fact that he is cognizant of my presence, and is an intelligent animal. What am I to do?

2007-12-02 03:52:57 · 3 answers · asked by aspie_goth_girl 1 in Zoology

A puck of mass 86.7 g and radius 3.73 cm slides along an air table at a speed of v = 1.53 m/s. It makes a glancing collision with a second puck of radius 5.12 cm and mass 120 g (initially at rest) such that their rims just touch. The pucks stick together and spin after the collision

2007-12-02 03:49:59 · 1 answers · asked by c c 2 in Physics

2007-12-02 03:49:51 · 3 answers · asked by Anonymous in Zoology

lim x^2+3x-5
x--->2

lim 2x+5/x-3
x--->3

lim x^2-x-6/x-3
x--->3

2007-12-02 03:46:47 · 3 answers · asked by 3Sigma 1 in Mathematics

http://www.weather.com/weather/local/48130?from=hrly_topnav_undeclared

2007-12-02 03:42:18 · 3 answers · asked by sc d 1 in Weather

I need a map of the volcano Krakatau including the plate boundaries around it.

2007-12-02 03:42:04 · 1 answers · asked by ffplayervii 3 in Geography