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3 to the power of 1994 |
1998-09-05 |
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Kim Tangney pose la question : What are the last two digits of: - 3 to the power of 1994
- 7 to the power of 1994
- 3 to the power of 1994 + 7 to the power of 1994
- 7 to the power of 1994 - 3 to the power of 1994
Penny Nom lui répond. |
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A divisor. |
1998-09-05 |
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Kim Tangney pose la question : When 391 758 and 394 915 are divided by a certain three digit numbers, the three digit remainder is the same in each case. Find the divisor. Penny Nom lui répond. |
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Rational Numbers |
1998-09-05 |
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Kristin Mckenzie pose la question : Iam a secondary student with a math question I don't know how to do. This is the question: Explain whether each decimal number represents a rational number. (a) 0.16 (b) 0.12 (c) -3.125 (d) -0.27 (e) -0,212 112 111 2 .... (f) 0. 457 92 If it wouldn't be a problem i would really appreciate it if you sent back the instructions on how to do the question. My name is Kristin Mckenzie and my return e-mail is lexus1999@hotmail.com Thank-you for you time Jack LeSage and Harley Weston lui répond. |
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Volumes |
1998-08-29 |
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Lorraine Wall pose la question : Consider the region in the first quadrant bounded by the x and y axes, the vertical line x=3 and the curve y = 1 / (x squared + 3). Determine the volume of the solid by rotating this region about the x-axis. Now that is the first part. I then have to find the coordinates of the centroid of the solid by rotating this region about the x-axis. Thanks. Lorraine Harley Weston lui répond. |
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The area and the circumference of a circle. |
1998-08-27 |
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Jason Wright pose la question : I was looking at the relationship of the area of a circle and the circumference when I realized that 2*pi*r is the derivative of pi*r^2. I was wondering if there is any connective deep dark meaning as to why this appears to be related. Thanks for any help you can give me! Walter Whiteley lui répond. |
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Golf problem |
1998-08-25 |
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Bob pose la question : Twelve golfers plan to play seven rounds of golf. Each would like to play as many rounds with different golfers as possible. What are the optimum combinations to accomplish that goal? Denis Hanson lui répond. |
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Frieze Patterns |
1998-08-19 |
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Brian Bairstow pose la question : I am doing a research project on frieze patterns (also called band patterns or border patterns). I know that there are exactly seven different types of frieze patterns, but I have been unable to find a proof for this. If you could tell me this proof, or tell me some internet sites on which I can find material on this, I would be very grateful. Chris Fisher lui répond. |
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Concurrent Lines in a Triangle |
1998-08-10 |
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Chris Woolf pose la question : The question is Name four types of concurrent lines, rays, or segments that are associated with triangles. Chris Fisher lui répond. |
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Two Problems |
1998-07-28 |
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James Pulver pose la question : How do you solve these problem? If log abc=16 and log ac=12 , find b. (The logs are log base 10.) and If a and b are real numbers, i^2 = -1 and (a+b)+5i=9+ai what is the value of b? Jack LeSage lui répond. |
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Area and Volume |
1998-07-28 |
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James Pulver pose la question : I am going into 12th grade and am practicing for the SAT II. I have come across a problem that I cannot solve. It states that the front, side , and bottom faces of a retangular solid have areas of 24 square centimeters, 8 square centimeters, and 3 square centimeters, respectively. What is the volume of the solid. I need to know how to solve similar problems so is there a formula to go from area to volume? Jack LeSage lui répond. |
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Parabolas |
1998-07-24 |
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Danica pose la question : how do you find the focus, vertex, and directrix of 4x-y^2-2y-33=0 Penny Nom lui répond. |
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Volumes of Revolution |
1998-07-24 |
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Lorraine Wall pose la question : I'm on the section fpr The Computation of Volumes of Solids of Revolution and the following question is giving me problems: -Consider the region in the first quadrant bounded by the x-and y-axes, the vertical line x=3, and the curve y=1/(xsquared + 3) I can determine the volume of the solid by rotating the region about the y-axis using the shell method but I can't seem to be able to get started with the volume when rotated about the x-axis. Harley Weston lui répond. |
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Snake Eyes |
1998-07-20 |
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Would you please advise me what the probability is of rolling snake eyes on a pair of dice is? My recollection is 1 out of 6 multiplied by 1 out of 6 = 1 out of 36 is this correct? Jack LeSage and Penny Nom lui répond. |
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Solving Quadratics |
1998-07-16 |
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Fred Goodrich pose la question : I need a step by step lesson on solving quadratic equations. Thank you, Penny Nom lui répond. |
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Calculus problems |
1998-07-13 |
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Lorraine pose la question : I'm stuck again. Can you help? This involves integration using the method of partial fractions the integral of: 7x(to the 5th) - 2x(cubed) + 3 dx -------------------------------------- x(to the fourth) - 81 Do I have to do long division to reduce the numerator to the fourth power? the integral of: 4- 16x +21x(squared) + 6x(cubed) - 3x(fourth) dx ---------------------------------------------------- x(cubed)(x - 2)(squared) Lorraine Harley Weston lui répond. |
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