Science & Mathematics - 29 July 2007

A horizontal trough with semicircular cross sections 5 feet in diameter contains oil with a weight density of 80 lb/ft^3. If the trough is 25 feet long and filled with oil to a depth of 3 feet, find the work required to pump all of the oil to the top of the tank?

2007-07-29 17:00:06 · 2 answers · asked by shortdude 2 in Mathematics

jus ignore the (>). I had to use it to get the right format of the problem.
>750
-DEF
----------
>DEF

Each of the letters D,E,F, represents a different digit in the subtracion problem above. What is the fraction that equals the decimal 0.DEF ?
a) 1/5 b) 1/4 c) 3/8 d) 1/2 e) 3/4

A broken watch loses 2 minutes every 4 hours. How long, in days, will it take the watch to lose 1 hour?
a) 2.5 b) 5 c) 6 d) 7.5 e) 10

2007-07-29 16:57:45 · 5 answers · asked by Anonymous in Mathematics

Normal Temp Pressure and Standard Temp Pressure.Are these terms same or different ?

2007-07-29 16:57:23 · 2 answers · asked by Rajchem 2 in Chemistry

2007-07-29 16:47:33 · 2 answers · asked by Kel 1 in Physics

2007-07-29 16:40:03 · 11 answers · asked by mary b 1 in Zoology

Are stingrays dangerous animals?

If so, why?

2007-07-29 16:39:20 · 4 answers · asked by Anonymous in Zoology

which of these is used as a measurement of latitude?
a the equator
b. the earth's axis
c. the prime meridian
d.the international date line

2007-07-29 16:34:28 · 5 answers · asked by La_morena 2 in Earth Sciences & Geology

1. Show that if 3 divides n2 evenly then 3 divides n evenly. [Hint: n can only be of the form 3a, 3a + 1 or 3a + 2]
2. The point P lies within the angle ABC and is equidistant from AB and BC. Prove that PB bisects the 3.In triangle ABC, P is a point on BC such that PB PC and PA bisects

2007-07-29 16:31:31 · 2 answers · asked by needhelp! 2 in Mathematics

Be a little bit detailed.

2007-07-29 16:29:59 · 10 answers · asked by CU 2 in Astronomy & Space

2007-07-29 16:29:26 · 5 answers · asked by Anonymous in Biology

y = 2x2 - 10x - 1

y = 4x2 + 12x + 9

y = x2 + x + 1

y = x2 -5x + 4

2007-07-29 16:26:32 · 3 answers · asked by Anonymous in Mathematics

if I'm receiving cisplatin (Platinol) intravenous chemotherapy, which of the following prescriptions would be questioned?
a. a bolus dose of furosemide
b. intravenous fluids at 150 cc per hour
c. Reglan 30 to 60 minutes prior to cisplatin
d. a follow-up appointment for a bone marrow test in 2 weeks

thank you

2007-07-29 16:20:57 · 1 answers · asked by Anonymous in Medicine

1. 16y2 - 8y + 1 = 0

2. c2 + 10c - 25 = 0

3. 5x2 + 8x + 16 = 0

4. a2 - 5a - 14 = 0

5. If a quadratic does not have a linear term (in other words it is a "pure quadratic"), then it will always have 2 real solutions.
true or false?

2007-07-29 16:19:43 · 3 answers · asked by Anonymous in Mathematics

2007-07-29 16:18:49 · 5 answers · asked by theblueyoshi 2 in Mathematics

I live in the Sacramento California area and do not not want to hurt this animal but simply try and relocate him to anothe area where he can find a better food source.

2007-07-29 16:18:12 · 8 answers · asked by Sheri M 1 in Zoology

(3-5x)^3
______ ,then f(x)=-5(2x+1)

(x^2+x-1)^2

2007-07-29 16:16:35 · 2 answers · asked by Anonymous in Mathematics

What are the basics and stuff? if you wanna explain to me in private then message me at myspace.com/rej2play i wanna learn more

2007-07-29 16:15:48 · 5 answers · asked by HardCandy 1 in Astronomy & Space

I'm considering ordering one so just wondering. I appreciate it if you're actually knowledgable and have sources, thanks!

2007-07-29 16:11:54 · 4 answers · asked by ? 3 in Physics

F(x) = x-1/X+2
F'(x)=3/(x+2)^2
F''(x) = 6/(x+2)^3

I need to find the following, I have some answer, and I need to make sure they are right

Domain of f: All real numbers execpt for -2

Find X and Y intercepts: do you set each equation to zero?

I know how to find all asymoptots

Critical Points

I know how to find if F is increasing or decreasing

Concave up is second derivative test... correct?

Any Inflection Points?

Sketch the graph (which is easy with the following information)

I've been studying extremely hard for this exam, and really would appreciate any help!

Thanks in advance!

2007-07-29 16:01:44 · 2 answers · asked by Anonymous in Mathematics

I noticed that whole numbers squared increase by the odd numbers. Halves increase by even numbers. Has anyone seen this in books anywhere?
1^2=1
2^2=4 . . . 4-1=3
3^2=9 . . . 9-4=5
4^2=16. . . 16-9=7

3, 5, 7, 9, 11, 13, 15

This pattern continues forever.

Also 0.5 squared equals 0.25,
1.5 squared equals 2.25,
2.5 squared equals 6.25
3.5 squared equals 12.25
2.25-0.25=2
6.25-2.25=4
12.25-6.25=6

2, 4, 6, 8, this pattern also continues.

I apologize for any mistakes, but I'm too tired to proofread this.

2007-07-29 15:50:26 · 5 answers · asked by Anonymous in Mathematics

Any Math Gurus out there. I need to find the first and second derivative of x-1/x+2.

I found the first derivate which his 3/(x+2)squared the denominator is squared.

I am having trouble finding the second derivative and then the domains.

Any help would be appreciated

2007-07-29 15:47:39 · 2 answers · asked by Anonymous in Mathematics

dormant muscle fibers?

2007-07-29 15:47:18 · 2 answers · asked by angeloldgarcia 1 in Biology

Space trave to the moon is considered as"a step of mankind".But some people think that space travel has made little difference on people's lives today.To waht extent do u agree or disagree?

2007-07-29 15:45:30 · 11 answers · asked by Anonymous in Astronomy & Space

(-3+i) + (4+6i) =


(-4 - 6i) + (-2 - 3i)


(4 + i) - (-3 + 2i)


(-2 + 5i) + (-4 - 2i)


(4 + 2i)(3 - i)


(-3 + i)(2 + 7i)


(5 + 2i)(5 - 2i)


4+2i over 3-i


3+i over 1-4i


-2-2i over 5-2i

2007-07-29 15:42:11 · 4 answers · asked by Anonymous in Mathematics

2007-07-29 15:40:08 · 2 answers · asked by mmoynan 5 in Earth Sciences & Geology

I was reading a Q & A book and it says the scientists are "still in the dark" on this one.

2007-07-29 15:36:10 · 3 answers · asked by Anonymous in Zoology

2007-07-29 15:33:39 · 5 answers · asked by Anonymous in Weather

If I take, say, twenty 3.7v 10Ah batteries , and wire them in series, I get 74v right? How many Amps do I have? (10,000mAh = 10Ah right?) Thanks!

2007-07-29 15:27:38 · 5 answers · asked by Jake 2 in Engineering

2007-07-29 15:27:34 · 9 answers · asked by ? 2 in Physics

2007-07-29 15:26:55 · 3 answers · asked by Anonymous in Chemistry