Mathematics (Science & Mathematics) - 24 November 2007

Explain as to why a constant wind causes the time of a round trip of an air plane to increase versus no wind? Give an example and calculate the round trip time with and without a constant wind. Do not discuss the physics of wind resistance. Rather discuss the mathematics of the round trip time and average speed of the plane with and without the wind.

A similar example is dollar cost averaging of buying stock. Dollar cost averaging of buying stock is to buy stock at periodic intervals by investing the same amount at each interval. For example, you invest $500 a month for 4 months for a total of $2000. If the stock price prices for the 4 months are $10/shr, $12/shr, $8/shr, and $10/shr, how many shares would you buy? How many shares would you buy if the average cost were $10/shr? How is this similar to the average speed of the round trip plane flight with a constant wind in a single direction?

2007-11-24 11:21:55 · 1 answers · asked by lvthebeach 2

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Half Angle Formulas.. Can anyone please answer Why Cos (x/2) = Cos x?

2007-11-24 11:20:09 · 5 answers · asked by sohan s 1

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Subtract. Express answer in simplest form?

Subtract. Express answer in simplest form
(3x/x-2)-(6/x-2)

2007-11-24 11:11:00 · 7 answers · asked by meme 1

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Evaluate 5^-2?

Evaluate
5^-2

2007-11-24 11:08:16 · 6 answers · asked by meme 1

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Need some help with this algebra question! See details?

Write an equation of variation using k as the constant. The pressure P of a gas in a sealed, compressible container varies jointly with the mass m of the gas and the Kelvin temperasture T, and varies inversely with the volume V of the container.

2007-11-24 11:05:18 · 1 answers · asked by ms_nita2002 2

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HARD Calculus hwk question.?

Calculus hwk help?
Use the first derivative test to show that the shortest distance from a point (P,Q) to the line ax+by+c=0 is

d= l aP+bQ+c l/ sqrt(a^2+b^2)

(assuming (P, Q) is NOT on the line)

I dont even know where to start...

proffessor mentioned we needed to treat the y in the distance formula as a function then substittue that in for the numerator of the implicit derivative plus the x and y and solve however that is not giving me the answer.

2007-11-24 11:05:10 · 1 answers · asked by Anonymous

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Help me with this math problem!! with i?

x^3 - 729 = 0

2007-11-24 11:01:43 · 6 answers · asked by Anonymous

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May you answer my easy question!? Please?

What is the lcd for

4(1/n)+n=10/2/5

2007-11-24 10:59:42 · 5 answers · asked by Ballerina 5

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-2y+11=-6y+35?

2007-11-24 10:55:31 · 7 answers · asked by shakbar 2

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Express Cos (x/2) in terms of Cos x?

2007-11-24 10:46:59 · 4 answers · asked by sohan s 1

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can someone answer this question 8/2 +2/8= to the simplest form?

2007-11-24 10:39:45 · 7 answers · asked by Mamamia 2

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"If i have a fish tank that is 17" tall and 24"long and 121/2" wide how many gallons is it?"

Please help me i suck at math, and i dont know how big my tank is??

2007-11-24 10:35:22 · 6 answers · asked by Josh 1

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How would i solve 3x^2 - 6x = 0 by factoring?

2007-11-24 10:33:51 · 5 answers · asked by sammi8385 1

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Math Question.?

The quotient of two numbers is four and their diferance is forty nine. What is the smaller number of the two?

2007-11-24 10:31:36 · 4 answers · asked by GF 1

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What is the answer to 4 1/5 divided by 1 2/5?

2007-11-24 10:30:55 · 4 answers · asked by Eddie D 1

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how do u factor these..?

2x^3+8x^2+8x

2x^4-32

x^2+16

2007-11-24 10:18:35 · 4 answers · asked by underlove 2

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Math Homework.....Help!?

I can't figure it out....
Jessica has 16 dimes and quarters. Whitney has twice as many dimes and 1/3 as many quarters as Jessica has. If they both have the same amount of money, what coins does each have?

2007-11-24 10:13:26 · 4 answers · asked by daniella26 2

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conver to polar form?

can you convert thjis to polar form

-3sqrt(7)-sqrt(21)i

2007-11-24 10:09:55 · 2 answers · asked by Anonymous

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Quick probability generating function question?

Using probability generating functions, find

P(X+Y=n) if X and Y are independent poisson distibutions with parameters a and b respectively.

Hence find P(X=k | X + Y = n) and E(X=k | X + Y = n)

2007-11-24 10:07:16 · 2 answers · asked by Anonymous

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