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Conditional probabiity |
2001-01-22 |
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Wallace Yang pose la question : A pair of six-sided fair dice is thrown. Find the probability that the sum is 10 or greater if it is given that a 5 appears on at least one of the dice. Penny Nom and Claude Tardif lui répond. |
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Square feet and cubic feet |
2001-01-21 |
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Jenny pose la question : How do I convert square feet to cubic feet? If I have 2000 square feet then how many cubic feet do I have? Harley Weston lui répond. |
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25% mark up |
2001-01-20 |
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Vivian pose la question : If it costs me $100.00 to manufacture an item and I want to sell it at a 25% mark up, why do I get different answers when I perform the operation the following ways? 1. $100.00 x 25% = $25.00 $100.00 + $25.00 - $125.00 2. $100.00 / .75 = $133.334 Should these two not be equal? Penny Nom and Claude Tardif lui répond. |
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A prism |
2001-01-18 |
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Nigel Ayling pose la question : What is the mathematical definition of a prism, I am confused by the following definitions as they appear to be contradicto... Walter Whiteley lui répond. |
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Proportionality: direct and indirect |
2001-01-18 |
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Nancy Ellis pose la question : What is the difference between directly proportional and indirectly proportional? Leeanne Boehm lui répond. |
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More repeating decimals |
2001-01-17 |
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Alan pose la question : I am neither a math teacher nor a student, but I hope you will consider my question anyway. I recently was discussing repeated decimals with a friend, and went on the web to find out more about a pattern was looking for years ago. In doing so I came upon your correspondence on repeating decimals. . . . Chris Fisher and Penny Nom lui répond. |
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Greatest common factor |
2001-01-17 |
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A teacher pose la question : I'm a teacher at a local Middle School and I would like the answers for the following questions. What is the greatest common factor for.. 546 and 780 156 and 732 . . . Leeanne Boehm and Penny Nom lui répond. |
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Motivators |
2001-01-16 |
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Michelle Stapley pose la question : Do you know of any (or where I can find) student motivators for math at the secondary level? Basically any way I can motivate my students to WANT to learn math. Penny Nom lui répond. |
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A problem with distance |
2001-01-16 |
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A student pose la question : For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26. Penny Nom lui répond. |
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Some complex problems |
2001-01-15 |
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Nick pose la question : I am having enormous difficulty with one question in my maths homework. The question is shown below. If anybody out there can find the answers and show the workings and help me to understand. Harley Weston lui répond. |
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Polynomials and exponents |
2001-01-15 |
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A student pose la question : I am duing a project in math on polynomials and exponents. I need a real life usage of polynomials and exponents for my project. Penny Nom lui répond. |
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The path of a cannonball |
2001-01-15 |
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A student pose la question : Artillerymen on a hillside are trying to hit a target behind a mountain on the other side of a river. Their cannon is at (x, y) = (3, 250) where x is in kilometers and y is in meters. The target is at (x, y) = (-2, 50). In order to avoid hitting the mountain on the other side of the river, the projectile from the cannon must go through the point (x, y) = (-1, 410). Write the equation for the problem. Penny Nom lui répond. |
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Some terms in a sequence |
2001-01-15 |
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jamie pose la question : Please help as soon as possible! i am stuck with some terms in a sequence. the terms are 1st term=1, 2nd term=10, 3rd term=35, 4th term=84, 5th term=165, 6th term=286. can anyone tell me the formula for the nth term? n is term number Sukanta Pati lui répond. |
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Arranging some numbers |
2001-01-14 |
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Denise pose la question : Arrange the following numerals in two groups of four each so that each group will add to give the same sum. 1 2 3 4 5 7 8 9 Penny Nom anf Claude Tardif lui répond. |
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Exponents |
2001-01-14 |
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A student pose la question : I am wondering if a number raised to the second power is "squared" and a number raised to the third power is "cubed" is there a name for any number raised to any other power. Harley Weston lui répond. |
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