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Science & Mathematics - 23 October 2007

[Selected]: All categories Science & Mathematics

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A) Sma 1

B) Hind 3

C) Eco RI

2007-10-23 05:34:41 · 2 answers · asked by damigurl05 1 in Biology

Simplify the expression below.
((5 x^(3) y^(8))^3) / (5 x^5)

Give your answer using only positive exponents where the coefficient is an integer.
------------------------------------------------------------------

Simplify the following expression. Express your answer in decreasing order.

(4x+5y) (4x-4y)

2007-10-23 05:34:00 · 4 answers · asked by Brandon M 1 in Mathematics

On a road trip, five friends drove at 50 miles per hour to California. On the way home, they took the same route but drove 75 miles per hour. How many miles did they drive on the way to California if the round trip took 10 hours?


don't give me the answer, just the steps.
thanks!

2007-10-23 05:31:07 · 9 answers · asked by Anonymous in Mathematics

Okay, my class is now doing arc lengths and the hardest part of it is taking the integral of a function in the square root. Any function inside the square root with a polynomial greater than 1 is something that cant be done. The only trick i found so far is trying to factor it.

Like one example is taking the integral of say.....

sqrt ((x^2+4x+4)

What i did was change the function and make it look like this....

sqrt ((x + 2)^2)

^^^^ that one is the same as sqrt ((x^2+4x+4)

So the square root and the square cancels out and I just take the integral of (x + 2) instead.

But now, what if you cant do that anymore? If you cant solve it like that anymore?

Is there a way to taking integrals of a function inside a square root? Like say the integral of the square root of (sinx e^x)

How do you do that?

2007-10-23 05:31:03 · 8 answers · asked by Anonymous in Mathematics

pills are scored in the middle. Which side, if any contains the painkiller

2007-10-23 05:27:56 · 2 answers · asked by godloves 1 in Biology

Details please

2007-10-23 05:25:31 · 19 answers · asked by Kat 3 in Paranormal Phenomena

2007-10-23 05:24:33 · 4 answers · asked by Anonymous in Mathematics

Hello everyone, need some help with some math exercises.

1-) Which ordered pair is a solution to the system?
-2x+7y=31
5x-11y=-45
I answered (2,5)

2-) Solve the system using the graphing method.
x+y=8
3x+y=20
I answered No Solution

3-) Solve the system using the substitution method.
y=5x+7
-3y+15x=-8
I got (7,-8)

4-) Solve the equations using the most convenient method.
8x-4y=6
16x=8y+12
Got ( 8,4 )

5-) If z(t)=2t.square+7t-4, find z(-1) and z(2)
This one im stumped.

Thanks for the help.

2007-10-23 05:17:41 · 5 answers · asked by felipe1974 1 in Mathematics

Will it make me feel "good"? Im a pot smoker...well...use to be...so the docs gave me this for depression...cause i cant smoke due to work.

2007-10-23 05:11:20 · 2 answers · asked by geno o 2 in Medicine

I have a spreadsheet with 3 columns. A contains an importance factor, a number from 1 to 5. B contains a percentage, the amount of the completed task. C contains the number of days it is taking to do/finish the task.

taskA 3|67%|30
taskB 1|98%|70

I want a total completed percentage for the project, where the project is made of those two tasks.

I can do it for 1 factor. For instance, with days as the weight:
=B1*C1/($C$1+$C$2)+B2*C2/($C$1+$C$2)
or 89% complete
But how do I factor the fact that taskB is less important (it's value is 1)? Thank you!

2007-10-23 05:10:30 · 1 answers · asked by jc 1 in Mathematics

i mean three base pair contain one amino acid. so 60 base pair contain 20 amino acid then why 61?

2007-10-23 05:09:41 · 3 answers · asked by Anonymous in Biology

A) 30-40

B) 75-90

C) 50-60

D) 60-75

2007-10-23 05:09:23 · 5 answers · asked by Anonymous in Biology

a. ATP is used to make sugars
b. Carbon dioxide is produced
c. sugar is used to make ATP
d. NADP is used to produce carbon dioxide

I think the answer is a. but just checking. Thanks.

2007-10-23 05:08:03 · 2 answers · asked by sjane 2 in Biology

I don't know why but people say trigo is hard and annoying. why?

2007-10-23 05:07:32 · 5 answers · asked by mike 1 in Mathematics

a. (6, 6)
b. (-6, -6)
c. (-6, 6)
d. (6, -6)

thanks!

2007-10-23 05:05:06 · 3 answers · asked by Anonymous in Mathematics

A camera's flash is powered by a 5.00×10−4 F capacitor. When the capacitor is fully discharged, It takes 2.00 seconds to get 99.0% recharged. A resistor is in series with the capacitor. What must its resistance be?

2007-10-23 05:03:39 · 2 answers · asked by Jaylen R 1 in Engineering

a. II
b. II
c. III
d. IV

thanks...

2007-10-23 05:02:20 · 11 answers · asked by Anonymous in Mathematics

φ(n) is normally divisible by 4. Describe all the n's for which φ(n) is not divisible by 4.

2007-10-23 05:01:59 · 2 answers · asked by 3545 2 in Mathematics

How would you apply a factoring formula to completely factor the expression "x4 - 1"?

2007-10-23 05:00:09 · 7 answers · asked by Snoopy Baby 1 in Mathematics

I've checked Wikipedia but it didn't really answer my question... Since it's measured in W m^-1, would I be able to say that the flux from the sun is the amount of energy received from the sun in an area of 1 m^2?

2007-10-23 04:56:52 · 2 answers · asked by Anonymous in Astronomy & Space

what effect would an increase in particle size have on reflectance from a soil across the visible and infrared wavelengths

2007-10-23 04:55:13 · 1 answers · asked by Lou 1 in Astronomy & Space

2007-10-23 04:51:18 · 2 answers · asked by Anonymous in Biology

I tried to look them up and am having no luck. They are not brown recluse spiders I am certain. We live in East Texas so they are probably common to this area. They are about the size of a pinky nail legs and body and the front legs are longer than the others. They have a bigger rounded back. If you may know what kind they are please help me.

2007-10-23 04:50:19 · 3 answers · asked by Lacie D 2 in Zoology

2007-10-23 04:49:08 · 2 answers · asked by winmen 1 in Botany

If the coefficients of a polynomial function are all positive, then the polynomial has no positive zeros.

2007-10-23 04:47:23 · 3 answers · asked by gigichic21 1 in Mathematics

I know stuff like jewelry but what else?

2007-10-23 04:40:47 · 4 answers · asked by Anonymous in Other - Science

Does it help at all or is it like pulling yourself out of a swamp by your own hair? An explanation and/or reference would be nice.

2007-10-23 04:39:14 · 7 answers · asked by Puppy Zwolle 7 in Physics

It happens at least once a day. I am driving down the street and a light will go off. Is it energy related? What the hell!

2007-10-23 04:37:05 · 8 answers · asked by Bambina 2 in Physics

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