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Mr.Carter is very cautious |
2003-11-26 |
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From Bob:
Mr.Carter is very cautious. He decides to invest in only three stocks: one low stock, one high stock, one medium stock. Given that the expected annual yields are 6% for low stock, 7% for medium stock, and 8% for high stock, he wants his investment in medium stock to be half of his total investment in low and high stock. How much should I invest in each type fo stocks to expect a total annual return fo $650 form my investments?
Answered by Harley Weston. |
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Area of an equilateral triangle |
2003-11-25 |
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From Jared:
Can you help me understand why the area of a equilateral triangle is the square root of 3 divided by 4 times the lenght of the side squared?
Answered by Penny Nom. |
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An inequality whose solution is all points |
2003-11-25 |
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From Katie:
Hi my name is Katie and I am in the 9th grade and I would like help on this question. Is it possible to have a system of inequalities whose solution is all points?
1.I need to know why (explanation)
2.how to do it(example)
Answered by Penny Nom. |
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The volume of an irregular tetrahedron |
2003-11-24 |
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From Peter:
How do I calculate the volume of an irregular shaped tetrahedron where:-
side a = 1.4 m
side b = 1.4 m
side c = 1.2 m
and height = 0.75 m at the junction of sides a and b.
Answered by Penny Nom. |
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Markup, profit and margin |
2003-11-24 |
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From Ali:
I have question regarding Margins, Markups and Profit
Purchase price = $ 10.00
Margin or Markup ?? = 40 %
Therefore Selling Price = 10/0.6 = $ 16.67
Profit ? = (16.67-10)/10 *100 = 66.67%
or is the profit = (16.67-10)/16.67*100 = 40 %
Can you please clarify What is Margin, Markup and Profit
Answered by Penny Nom. |
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Difference of squares |
2003-11-24 |
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From Susie:
Factor assuming that n is a positive #
Problem: (I will give it to you in words beacuse I don't know how to do exponents on the computer.)
Forty-five r to the 2n power minus five s to the 4n power.
I was hoping you could walk me through it not just give me the answer.
Answered by Penny Nom. |
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An octagon shaped bed frame |
2003-11-23 |
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From Trish:
My son and I are making an octagon shaped bed frame. We are going nuts trying to figure out what angle to cut the boards to make an outline of an octagon. It seems that the 8 inside angles of the 8 "corners" are 120*, but what is the angle that the 2x6 wood should be cut so that they will angle together to form the outline of the octagon?
Answered by Penny Nom. |
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Laws of sines and cosines |
2003-11-23 |
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From A parent:
On the one side of a stream lines PA= 586.3 feet, PB = 751.6 feet are measures, angle APB being 167 degrees and 36 min. Q is a point on the opposite side of the stream. Angle PAQ=63 degress and 18 min and PBQ=49 degrees and 24 min. Find PQ.
Answered by Penny Nom. |
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The volume of a cube |
2003-11-22 |
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From A student:
i have a cube, and the line that cuts threough the middle of the cube across to the other side is 4 radical6. what is the volume of the cube?
Answered by Penny Nom. |
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Aristotle |
2003-11-21 |
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From John:
I would like to know how aristotle was related to math.
In all my searches I have found only philosophy etc.
But not any math.
Answered by Penny Nom. |
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AB/AP=AP/PB |
2003-11-20 |
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From James:
My name is James McBride. I'm having a difficult time with a pre calculus problem, which goes as follows: "show that AB/AP=AP/PB is equal to (1+5^1/2)/2 (one plus the sqaure root of five with the sum divided by two. I can't do the square root sign, sorry.) I have tried to solve for PB in terms of the other varialbles and then work the quadratic equation. THAT DOES NOT WORK!!!! I am befuddled. Please help me. I am a student of secondary level.
Answered by Penny Nom. |
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Four digit numbers |
2003-11-20 |
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From Rob:
Hello, I sure hope you can answer this question. I got into a discussion at work about how many possible combinations there are for a four digit number using the numbers 0 through 9. This was in reference to a discussion about the lottery. I said there was only 10,000 possible combinations. My friend said that there was many times more, but he could not remember how to figure it out. The answer and the formula would be greatly appreciated.
Answered by Penny Nom. |
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962 Sq. Ft. is what percent of 2656 Sq. Ft |
2003-11-20 |
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From Jon:
962 Sq. Ft. is what percent of 2656 Sq. Ft
Answered by Penny Nom. |
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4(r-2) = r(2+8) |
2003-11-20 |
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From Angela:
I not going to give you the problem that I have, but a problem like it.
4(r-2) = r(2+8)
I get mix up trying to solve a problem like this could you help me. So that I will be able to handle the ones on my homework.
Answered by Penny Nom. |
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Des tables trigonométriques |
2003-11-20 |
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From Jean-Jacques:
Je suis à la retraite et en train de mettre à jour mes connaissances en trigonométrie. On peut facilement trouver les rapports entre les côtés d'un triangle droit ayant des angles secondaires de 30, 45 et 60 degrés, mais comment s'y prend-on pour calculer les rapports entre les côtés d'un triangle droit ayant des angles secondaires de valeurs intermdiaires. En d'autre mot, comment s'y prend-on pour faire le calcul détaillé des tables trigonométriques. J'ai cherché en vain dans divers textes de géométrie la réponse à cette question. Merci à l'avance pour l'attention que vous porterez à ma requête.
Answered by Claude Tardif. |
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