Science & Mathematics - 8 September 2007

A position of a runner is given by x=4.10t-0.500t^2, where x is in meters and t is in seconds. What is the average speed between t=0 and t= .820 s?

2007-09-08 17:48:16 · 1 answers · asked by Anonymous in Physics

2007-09-08 17:45:50 · 1 answers · asked by Ase 2 in Mathematics

by using multiplication, addition, subtraction, OR division! Please Reply! Today!

2007-09-08 17:43:44 · 7 answers · asked by Naruto Uzumaki 2 in Mathematics

If x = 1

how can it equal x = 0.9 recurring?

2007-09-08 17:42:55 · 3 answers · asked by Anonymous in Mathematics

the answer is f(x)=-29+12n+n^2. but I don't understand how they got that. Please include steps.

2007-09-08 17:37:59 · 3 answers · asked by Angela T 1 in Mathematics

It is expected that the melting point would increase if the experiment isconducted at a lower altitude. Explain briefly why this happens with refernece to the packing of the molecules.

2007-09-08 17:37:35 · 1 answers · asked by Anonymous in Physics

The weight of a ball rolling down an inclined plane can be broken into two vector components: one acting parallel to the plane, and the other acting perpendicular to the plane.
a) at what slope angle are these two components equal?
b)at what slope angle is the component parallel to the plane equal to zero.
c) at what slope is the component parallel to the plan equal to the weight?


When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:36:04 · 1 answers · asked by book worm 1 in Physics

What are the magnitudes of the horizontal and vertical components of a vector that is 100 units long, and oriented at 45 degree?

When you answer the question, please also explain WHY, because I don’t just want the answer, I want to learn also =)

2007-09-08 17:35:16 · 1 answers · asked by book worm 1 in Physics

or Is It Random.

Just Wonderin As Some Sattelites Have Round Orbits, While Others Have Elliptical.
So The Space Has A Curvature Defined By Exactly What?

2007-09-08 17:34:16 · 4 answers · asked by engelfeurs 2 in Astronomy & Space

2007-09-08 17:30:34 · 11 answers · asked by Anonymous in Astronomy & Space

2007-09-08 17:23:01 · 4 answers · asked by roytia 1 in Engineering

Write an equation that can be used to solve the following problem: The cubic function C(t) = 1.054t3 + 28.0729t2 + 238.50t + 1122.6 can be used to model carbon emission in millions of metric tons from consumption of solid fuels (e.g. coal and wood) in the U.S. in the year 2000 + t. According to the model, in which year(s) will (or was) carbon emission from the consumption of solid fuels equal to 900 million metric tons.

I put:
900 = 1.054(t)^3+28.0729(t)^2+238.50(t)+1122.6

But it was marked wrong. Where did I go wrong?

2007-09-08 17:22:29 · 2 answers · asked by Shoe Girl 2 in Mathematics

A function f: M-->N is open if for any open subset A of M, f(A) is an open subset of N.

2007-09-08 17:22:10 · 2 answers · asked by guyava99 2 in Mathematics

I received the answer 7/2 units is this rite?

2007-09-08 17:21:48 · 3 answers · asked by Richard Boolean 2 in Mathematics

It is related to the AGM Inequality and is supposed to be used when doing this. The AGM inequality is

2xy <= x^2 + y^2

2007-09-08 17:20:11 · 2 answers · asked by Anonymous in Mathematics

Z-X=22

Y/X=7

Y+Z=70

what do X, Y, and Z equal?

2007-09-08 17:16:43 · 10 answers · asked by Bon Jovi Rocks Hard 4 in Mathematics

2007-09-08 17:15:28 · 10 answers · asked by Caysie101 5 in Astronomy & Space

2007-09-08 17:14:22 · 4 answers · asked by Caysie101 5 in Physics

How many mL of a 0.524 M solution of CH3OH will contain 11.3 g of CH3OH?

Not sure how you figure this...

2007-09-08 17:11:14 · 2 answers · asked by lub1210 1 in Chemistry

A bullet of mass 0.117 kg traveling horizontally at a speed of 200 m/s embeds itself in a block of mass 2 kg that is sitting at rest on a nearly frictionless surface.

What is the speed of the block after the bullet embeds itself in the block?
v = m/s

2007-09-08 17:10:50 · 3 answers · asked by Elvis P 1 in Physics

3(2x + 1) -2(x - 6) now this is the numerator the denominator is x+6 now what is the answer if x =-3

2007-09-08 17:09:24 · 8 answers · asked by britt2fly 4 in Mathematics

A pair is on discount for 30% off of the original price which is $35.99 and then another 15% off the sales price. How much would you pay for the pants??

2007-09-08 17:08:15 · 4 answers · asked by xo cAnDii ♥ 5 in Mathematics

Using fake pumpkin and cut into it and placed a strofoam ball in it. I want to use the pumpkin to be creative but dont know what it could be because the large strofoam ball is the cell itself it is where all the organells are going onto. PLEASE HELP!! THANK YOU SO MUCH.

2007-09-08 17:08:04 · 3 answers · asked by Anonymous in Biology

it has been over 5 years since i last took algebra and this stuff is dormant in my head. i know it's simple, but i can't remember it and the book is too advanced and doesn't explain it.

how do i factor the following:

6x²+7x-3=0

from what i can remember..... i know it has to go like this
(x__+___)(x__+___)

and that one side is the sum of 2 integers, and the other is the product of 2 integers... but i can't remember the order....
can you please help?

2007-09-08 17:06:00 · 4 answers · asked by Anonymous in Mathematics

2007-09-08 17:05:24 · 2 answers · asked by diffusemenow 2 in Mathematics

is it like only in the degrees??? like for perpendicular 90 but for angle bisector it doen't matter????? am i right??? is that it???

2007-09-08 17:00:02 · 5 answers · asked by Anonymous in Mathematics

2007-09-08 16:59:45 · 9 answers · asked by Roman O 1 in Mathematics

2007-09-08 16:59:15 · 7 answers · asked by Anonymous in Astronomy & Space

i can't write the exponent. i meant i dont know how.. is 6( 3x ^5)^2 like that right.. lol but yeh i dont know how to solve the problem

2007-09-08 16:56:04 · 4 answers · asked by loving_you_4ever 2 in Mathematics

Segment HK is an altitude of triangle GHI. Find the measure of angle HKG.

a)75

b)90

c)85

d)Cannot be determined

2007-09-08 16:55:58 · 2 answers · asked by Anonymous in Mathematics