Science & Mathematics - 4 September 2007

2007-09-04 16:29:38 · 4 answers · asked by Jeff S 1 in Zoology

2007-09-04 16:29:06 · 2 answers · asked by Anonymous in Engineering

I'm usually a pro at these. But there is a detail at the end and I'm not sure how to write the equation around it. I already figured out the answer but I want a "prettier" equation.

Truck leaves town A at 2 p.m. heading for town B, traveling at 40 mi/h. At 3:15 car leaves town B heading to town A traveling at 55 mi/h. (Easy) But then it says - the truck and car pass when the car is 2 hours from town A. How far apart are the towns?

40t = 55(t - 1.25) gets me nowhere.

I know 2 hours represents 110 miles left in the car's journey. The answer is 192.5 miles because I just gridded the problem out. Any takers?

2007-09-04 16:28:50 · 5 answers · asked by Anonymous in Mathematics

What did you think of your geometry class?
Thanks.

2007-09-04 16:27:40 · 3 answers · asked by MaggieSin 3 in Mathematics

any tips would be great.


1. antideriv of x(4thrt(1-x^2))dx
i got -2/5(1-x^2)^((5/4))+c but the book says it should be ^(5/2)

2. antideriv of (sin(x/3))^5(cos(x/3))dx
i got -1/6(sinx/3)^6+c but that book says its 1/2 in the front

3. antideriv of sec(x+pi/2)tan(x+pi/2)dx
i got cos(x+pi/2)+c but the book says its secant

4. antideriv of (sin(2x+1))/(cos(2x+1))^2dx
i got cos(2x+1)^-1 but the book says there is a 1/2 in front

5. antideriv of (sqrt(cotx))(cscx)^2dx
couldnt get much anywhere in this one

6. antideriv of (1/x^2)sin(1/x)cos(1/x)dx
i think this one is all wrong cuz i got -sin(1/x)+c and the book has it sqrd and times 1/2

7. antideriv of (x^3)(sqrt(x^2+1))
i dont know where to start because what i thought would be u is not able to be because of the x^3... its one x too big!!

2007-09-04 16:26:21 · 1 answers · asked by sportyarteest 2 in Mathematics

2007-09-04 16:14:17 · 5 answers · asked by Urrka N Da CLuB 1 in Weather

A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s2 for 14.0s. It runs at constant speed for 70.0s and slows down at a rate of 3.50 m/s2 until it stops at the next station. Find the total distance covered. Could someone please help me set this up and solve it. I believe the answer is around 1.8km. Thanks

2007-09-04 16:10:02 · 2 answers · asked by dantheman772 2 in Physics

what is the minimum speed to leap off the cliff to miss the ledge at the bottom that is 1.75 m wide and 9.00 m below the cliff?

v= m/s

2007-09-04 16:08:22 · 1 answers · asked by thewayworldturns 2 in Physics

The curve traced out by a point at a distance 1 m from the center of a circle of radius 2 m as the circle rolls along the x-axis is called a trochoid and has parametric equations:
x=2θ-sinθ y=2-cosθ
One arch of the trochoid is given by the parameter interval 0≤θ≤2π. Find the area under one arch of the trochoid.

2007-09-04 16:08:10 · 3 answers · asked by dawance88 2 in Mathematics

1. Which group of stars are the most stable? Why?

2. Which group of stars represent most of the stars in space? Why?

I'm not sure but is number 2 the main sequence stars? but even if that was right, i need a explanation.

2007-09-04 16:01:43 · 5 answers · asked by Anonymous in Astronomy & Space

2007-09-04 16:00:13 · 4 answers · asked by shecries4you 1 in Physics

2007-09-04 15:59:42 · 12 answers · asked by Candace 1 in Zoology

i forgot what it was like the rule for adding signed numbers is subtract small number from big number and keep the big numbers sign, well what about subtracting sigend numbers?

example: (-5) - 3 = ?

2007-09-04 15:56:10 · 6 answers · asked by questioner♥ 3 in Mathematics

2007-09-04 15:52:31 · 5 answers · asked by lolabarry 2 in Physics

2007-09-04 15:51:03 · 2 answers · asked by Deesa 2 in Mathematics

i need this for school, i couldnt find it online so can u help me?

2007-09-04 15:47:05 · 2 answers · asked by thcuxhddfvhg 1 in Zoology

2007-09-04 15:45:27 · 9 answers · asked by turlington999 1 in Mathematics

2007-09-04 15:43:56 · 17 answers · asked by neil mac 1 in Zoology

the explaination could be used to explain to another college student possibly even one who is not in your class.

2007-09-04 15:43:33 · 4 answers · asked by Anonymous in Mathematics

2007-09-04 15:42:57 · 11 answers · asked by coolrav09 1 in Other - Alternative

2007-09-04 15:41:35 · 7 answers · asked by turlington999 1 in Mathematics

with no imprints on either side of it, just a line (sorta wide) on the one side of it. what is it?? Please, only answers if you actually may know what pill this is. Thanks.

2007-09-04 15:37:44 · 1 answers · asked by Anonymous in Medicine

Ur gunna think im stupid 4 askin this BUT i wunna know is it summer or fall???

2007-09-04 15:36:33 · 8 answers · asked by Marlee 3 in Weather

My brain is officially like not working.
Can someone tell me which side it is?
Provide proof with your answer, such as a website please.
=]
Thanks in advance!

2007-09-04 15:34:24 · 25 answers · asked by whatisn'twouldn'tbe™ 4 in Astronomy & Space

2007-09-04 15:32:12 · 7 answers · asked by Anonymous in Mathematics

I need this in expanded form.. Thank you

2007-09-04 15:30:57 · 24 answers · asked by Lords of Stockton 3 in Mathematics

f(x) gives the cost (in thousands of dollars) of buying x acres of land in a remote area of Vermont. Carefully interpret the following:

a) f(50) (your answer should take the form "f(50) is...")
b) f^-1 (50) (your answer should take the form "f^-1 (50) is....")

2007-09-04 15:30:43 · 10 answers · asked by stjdarylthomas 2 in Mathematics

Sums and differences of cubes??

Factor Completly:

1) 3z^5 - 3z^2

2) a^9 + b^12 c^15

2007-09-04 15:29:05 · 1 answers · asked by Anonymous in Mathematics

but they uses science to prove what's in the bible....
So if you believe science is false.... So how can they use it to prove the bible




Im just wondering...

oops you say

2007-09-04 15:28:38 · 9 answers · asked by alfjr05 1 in Other - Science

I saw one just like this at a driving range just outside of Toronto, Canada at the end of August. The link is to a picture very similar to the bug I saw. I've never seen any bug so white in my life and I'm super curious as to what it is.

If anyone out there can tell me I would hugely appreciate it.


Thanks.


http://www.flickr.com/photos/fondofelves/192983831/

2007-09-04 15:28:03 · 5 answers · asked by Anonymous in Zoology