Science & Mathematics - 12 October 2006

The sum of the base and the height of a triangle is 56 inches. Find the base and height for which the area is a maximum. Also, find the maximum area.

Thanks in advance... I don't even know where to start on this one.

2006-10-12 11:48:57 · 3 answers · asked by MysteryMan 1 in Mathematics

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Will a car charger power an electromagnet?

The car charger is either 2amp or 4 amp for slow charge 10amp for fast charge and jump start Does it matter?
There's 2amp, 4 amp, and 10amp charger. Which charger to go with for powering an electromagnet of 208-230V and 50/60Hz ? What about 5 magnets in a series? Does it matter?

2006-10-12 11:48:55 · 3 answers · asked by burnholywater 2 in Engineering

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who stoned the amorites while joshua led an attack on them?

TELL WHERE IN THE BIBLE THE ANSWER IS FOUND IF YOU CAN

2006-10-12 11:48:42 · 3 answers · asked by tasheena_miss_pinky 1 in Mathematics

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Sovle: (y-7)/(y^2+5y) - (y-1)/(y^2-25).?

This is one fraction minus another fraction to solve for "y".

2006-10-12 11:47:31 · 4 answers · asked by honest abe 4 in Mathematics

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What steps should a person take who's depressed before accepting a diagnosis of depressed or bipolar?

Before taking this label, shouldn't a person explore all other avenues like excercise, talk therapy, thyroid check, sunshine etc? What else should one do? Taking on the label of mentally ill or under treatment for psychiatric condition is a big deal.

2006-10-12 11:47:15 · 6 answers · asked by icu812 3 in Medicine

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Helium in tyres to make bikes lighter?! Graphite is too expensive…?

Do you think inflating tyres of bicycles with Helium instead of air would make them significantly lighter?

2006-10-12 11:44:36 · 10 answers · asked by Alexis (From France) 1 in Physics

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How are pearls created in nature?

Which countries harvest natural pearls? , In which countries is the production of cultured pearls a major industry?

My kid needs this for a science extra credit thing and I find nothing of much use.....HELP!

2006-10-12 11:44:25 · 7 answers · asked by Nessa005 2 in Earth Sciences & Geology

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Solve: x/(x^2-3x+2) - 3/(x^2-1^2)?

This is one fraction minus another fraction to solve for "x"

2006-10-12 11:42:55 · 8 answers · asked by honest abe 4 in Mathematics

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STANDARD ERROR: Linear Regression Trendline?

CAVEAT: I have a limited knowledge of statistics and and am not particularly adept with respect to formulas. Hence, kindly explain using prose if you would.

ISSUE: Using stock trading software by prophet.net, a 64-day Linear Regression Trendline ("LRT") is currently the best fit for a particular stock. The 64-day LRT has an R-squared of .933. Now, the trading software has an indicator called "Standard Error Bands" which allows you, for example, to enter (64,3), (64,2), (64,1) etc. In this example, of course, the indicator plots "standard error band" values ("SE") (3SE, 2SE, 1SE etc.) both above and below the 64-day LRT.

With all this in mind, I have researched how to calculate "standard error" but my results don't seem to match the trading software. The trading software determines the 64-day LRT by using the CLOSING prices for the last 64-days. Can someone give me a step-by-step on how to calculate the 1SE of the 64-day LRT. ASSUME THAT I ALREADY HAVE THE LRT VALUE--I do.

2006-10-12 11:42:53 · 1 answers · asked by Anonymous in Mathematics

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In "Rock, Paper, Scissors", what are the best methods for increasing your chances of winning?

2006-10-12 11:42:53 · 18 answers · asked by Bob 3 in Other - Science

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PLease name these ionic formulas?

Li+ O(2+ charge)
Be(pos 2 charge) Cl(-)
Ti(4+ charge) N(3- charge)
Co( roman numeral 3) H(-)

2006-10-12 11:42:10 · 1 answers · asked by baby*Phat 2 in Other - Science

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What affects a pendulum's swing?

science

2006-10-12 11:42:08 · 6 answers · asked by Jesse 1 in Other - Science

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I need a diagram of a jumping spider & a crab spider, where can I find them?

2006-10-12 11:41:23 · 4 answers · asked by Anonymous in Biology

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We are made of L-amino acid and have the heart on the left. R-amino acid and heart on the right?

Chirality leads to chirality, therefore, do you think that if nature would have chosen R-amino acid instead of L-amino acid as building block in our protein, human would have the heart on the other side?

2006-10-12 11:36:53 · 2 answers · asked by Alexis (From France) 1 in Biology

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when is the world expected to end?

either from a religious standdpoint or strictly scientific doesnt matter.

2006-10-12 11:36:23 · 20 answers · asked by t _la 3 in Other - Science

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what's the total?

so i need to pay the sitter in the morning so please tell me how much do i owe her! 4 dollar's an hour. 2 week's of pay. am - pm please give me the correct amout due...you can round up. ty ty ty

drop off pick up

7:55 - 3:19
8:00 - 3:27
7:55 - 3:24
8:03 - 2:56
8:00 - 1:48
8:00 - 3:22
7:56 - 3:30
7:56 - 2:49
8:00 - 3:15

2006-10-12 11:33:33 · 7 answers · asked by the_sac_kings_r_number_1 1 in Mathematics

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Some tough integrals...?

I have two integrals from my calculus homework that I can't figure out how to do and I don't have any software that does symbolic calculus. If anyone could try these on Mathematica or Maple, that would be awesome. Here they are

(1-y^2)sin(y^3)

and

(1-x^2)sqrt(x^3+1)

2006-10-12 11:31:28 · 3 answers · asked by jjjones42003 5 in Mathematics

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Want to know exactly how to do this?

A similar question will probably be on exam, & want to be sure I know how to do it. There is no equivalent problem in the textbook:

A light horizontal spring has a spring constant of 135 N/m. A 2.18 kg block is pressed against one end of the spring, compressing the spring 0.101 m. After the block is released, the block moves 0.287 m to the right before coming to rest.

What is the coefficient of kinetic friction between the horizontal surface and the block? Acceleration of gravity is 9.81 m/s^2.

2006-10-12 11:29:57 · 1 answers · asked by Mariska 2 in Physics

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can u help me to find value of f(m-2) if f(x) is 5/ x +2?

i would like 2 say thank for helping me find the answer

2006-10-12 11:29:14 · 3 answers · asked by Anonymous in Mathematics