Science & Mathematics - 4 November 2007

an=sqrt(n+5)/(8n+5)
an=1/(4n+7)
an=(cosn)/(5^n)
an=(n-7)/(n+7)

2007-11-04 09:27:38 · 1 answers · asked by Cindy 1 in Mathematics

a telephone plan is $35 for 400 minutes and $4.00 a mintue per extra minute. Mary uses 600 that month. Write a piecewise function.

thanks!

2007-11-04 09:22:28 · 6 answers · asked by name has been deleted 1 in Mathematics

So I have a soda can that I painted black, and I need to find away to get it to heat up outside with just the sun...any ideas....

2007-11-04 09:21:41 · 3 answers · asked by Anonymous in Physics

2007-11-04 09:21:02 · 7 answers · asked by Anonymous in Mathematics

explain if no and if yes is there a function that i could graph to prove it?

there is no specific interval in which this has to happen

2007-11-04 09:20:26 · 1 answers · asked by Anonymous in Mathematics

if there are many forces acting on an object, how can the net force be 0?

PLEASE only answer if you know about science and forces. thnx

2007-11-04 09:20:06 · 1 answers · asked by bluez 2 in Physics

its a piecewise function

true or false and WHY?
IF...
f(x)= {3, x<0
{x^2, 0 {7, x>4

then f(3)=0,

i dont understand this. is it true or false. and i need an explanation, thanks!

2007-11-04 09:18:38 · 1 answers · asked by name has been deleted 1 in Mathematics

MUST HAVE LINKS THAT END WITH .gov!!!!!!!!!!!!!!!!!!

2007-11-04 09:13:54 · 1 answers · asked by Raych 2 in Earth Sciences & Geology

2007-11-04 09:13:47 · 1 answers · asked by Fred W 1 in Zoology

2007-11-04 09:09:14 · 1 answers · asked by Anonymous in Mathematics

2007-11-04 09:07:59 · 9 answers · asked by Ramsay S 1 in Engineering

2007-11-04 09:07:39 · 1 answers · asked by Anonymous in Mathematics

For Example, take the anti derivative of (4x+1)^(1/2)

2007-11-04 09:06:28 · 8 answers · asked by Anonymous in Mathematics

plz help me

2007-11-04 09:03:22 · 2 answers · asked by cocopuffs 2 in Mathematics

Sarah's new country home needs electricity. Her new house is in the woods eight miles straight back from the highway(along the road), and twelve miles from the nearest substation (which is next to the highway). It costs $400 per mile to extend existing lines along the highway, $550 per mile along the roads and $850 per mile to run them through the woods. If Sarah wants to minimize the cost of the new lines, find the best path to lay the lines. Be sure to check the cost of the two extremes: following the roads entirely, cutting through the woods entirely. Then use calculus to minimize the cost of following the road for a bit and then cutting through the woods. In your answer be sure to explain how far to follow the highway and what distance it will be through the woods?

2007-11-04 09:03:03 · 2 answers · asked by lilviet_devil 1 in Mathematics

my science gave us this stupid assignment!?
if you know that one do might know the difference between astrology and astronomy?

2007-11-04 09:02:38 · 3 answers · asked by Anonymous in Astronomy & Space

calculus

2007-11-04 09:02:27 · 1 answers · asked by Anonymous in Mathematics

Dilute 2 mL of ammonium to 100mL with water, then separately mix 10 mL of ammonium with 10 mL of water. Next add the two solutions together? what is the final v/v% , what is the ppm ?

2007-11-04 09:00:01 · 2 answers · asked by Anonymous in Chemistry

2007-11-04 08:59:38 · 4 answers · asked by Anonymous in Other - Alternative

What is the answer of -5 - x over 4x+1 = 10x+15 over 3x? I'm kinda lost...

2007-11-04 08:53:02 · 3 answers · asked by Anonymous in Mathematics

√(50x^6y^5)

2007-11-04 08:51:50 · 3 answers · asked by Anonymous in Mathematics

2007-11-04 08:48:18 · 1 answers · asked by Anonymous in Mathematics

What do angiosperms use as a source of food

2007-11-04 08:47:51 · 2 answers · asked by Anonymous in Botany

Suppose that p/q is a rational number such that
137/2008 < p/q < 137/2007, and that p and q
are relatively prime positive integers.
a. What is the least possible value for q?
b. What is the 2007th smallest possible value for q?

I got as far as

0.06822...< x < 0.06826
like the title says this is like impossible to get!

2007-11-04 08:47:17 · 4 answers · asked by ? 2 in Mathematics

2007-11-04 08:45:39 · 22 answers · asked by HaZiM 1 in Mathematics

A 65.0 kg ice skater moving forward with a velocity of 1.80 m/s throws a 0.280 kg snowball forward with a velocity of 26.0 m/s.

(a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and the ice.

(b) A second skater initially at rest with a mass of 60.0 kg catches the snowball. What is the velocity of the second skater after catching the snowball in a perfectly inelastic collision?

i know u use like MaVai+MbVbi = MaVaf+MbVbf for something..could someone tell me how i would use this formula for this question..? you don't have to solve it for me i just want to know how i would use this.. T_T

2007-11-04 08:45:28 · 1 answers · asked by Anonymous in Physics

2007-11-04 08:44:18 · 4 answers · asked by Anonymous in Biology

2007-11-04 08:42:54 · 6 answers · asked by Tesia G 1 in Mathematics

The amount of rain we got last month was 2 inches more than what we got this month. we got 3.5 inches last month. how would i write this in an equation

2007-11-04 08:40:15 · 4 answers · asked by Yeboseyo? YAH Yeboseyo!? 2 in Mathematics

' (Decay in the narrowest sense of its time/space meaning.)

2007-11-04 08:36:25 · 6 answers · asked by te144 7 in Physics