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Word problems |
1999-02-09 |
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Brian Rodriquez pose la question : Please answer these problems with a formula. Also explain in English step by step how these problems should be solved. I know the answer I just don't know how the answer was achieved Thank you very much for trying to help - A ski lift carries a skier up a slope at the rate of 120 feet per minute and he returns from the top to the bottom on a path parallel to the lift at an average rate of 2640 feet per minute. How long is the lift if the round trip traveling time is 20 minutes?
- An airplane on a search mission flies due east from an airport, turns and flies due west back to the airport. The plane cruises at 200 miles per hour when flying east, and 250 miles per hour when flying west. What is the farthest point from the airport the plane can reach if it can remain in the air for 9 hours?
Jack LeSage and Penny Nom lui répond. |
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Grade 4 curriculum |
1999-02-09 |
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John pose la question : My daughter is in grade 4 and her math teacher has asked her to write out the number 1 to 10,000. She is currently at 4567 and is sick of it. When I complained that this was not a usefull exercise she said that the Ministry of Education curriculum requires this and gave a photocopy of the page. It states: "read and write whole number to 10,000 in standard, expanded, and written forms (eg., 9367=9000+300+60+7 = nine thousand three hundred sixty-seven). Has the teacher interpreted this the wrong way? Thanks John PS. Do you have a web address for Ontario Math and Science Teachers organization? Jack LeSage lui répond. |
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Primary Mathematics |
1999-02-08 |
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Syairul pose la question : Mr Wu earned $2365 in January. He earned $375 more in February than in January. If he spend $4250 in the two months and saved the rest, how much did he save? Jack LeSage lui répond. |
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John Napier and e |
1999-02-06 |
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Shimin pose la question : I would like to ask about the exact definition of e, its history (like how John Napier came about discovering it) and its applications in problems and real life situations. Thank you! Chris Fisher lui répond. |
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Dividing Decimals |
1999-02-06 |
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Melanie Campbell pose la question : i ugently need to know how to divide a decimal by a decimal eg:6.0 divided by 2.4 i need to show all working on a basic skills exam please help!!!! mel Jack LeSage lui répond. |
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Lunes |
1999-02-04 |
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Kai G. Gauer pose la question : A prof once told me that a certain type of lune is quadrable given that the diameter is an integer. She used the construction of a right isosceles triangle within a semicircle and later constructed another semicircle on the base of the first semicircle and used area subtraction to show equality to a smaller triangle with quadrable area. What happens when the original inscribed triangle is no longer isosceles? She mentioned something about other lunes also being quadrable; but not all. What are the dimensions of other such lunes? Note: I'm not certain if I still have my hercules account; please simply post on Q&Q. Thanks! Chris Fisher lui répond. |
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Modular Arithmetic |
1999-02-04 |
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Leslie Kupper pose la question : I am trying to do a project on modular arithmetic. I was wondering if there were any websites that include a sample lesson plan on modular arithmetic for any grade level. Let me know where and how to find them. Thanks. Harley Weston lui répond. |
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Money and Counting |
1999-02-03 |
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Deborah Goodman pose la question : I am looking for ways to tutor my daughter in money counting and handwriting skills. Jack LeSage lui répond. |
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Cannonballs |
1999-01-27 |
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Roger King pose la question : How many cannonballs can be stacked in a triangular pyramid? Penny Nom lui répond. |
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Simplifying Radicals |
1999-01-26 |
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Mary pose la question : I would like to know how to simplify this question:
4 __________________ squareroot7 + squareroot3
I know the answer is (sqrt7 - sqrt3) but i would really love to know how to get that answer!! Thanks. Jack LeSage and Penny Nom lui répond. |
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Simplifying Radicals |
1999-01-25 |
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Randy pose la question : Find the perimeter of a rectangle in simplified radical form L=root80 W=root45. I would appreciate a detailed explination of the process for solving. Jack LeSage and Penny Nom lui répond. |
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The Quadratic Formula |
1999-01-22 |
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Eric Morgan pose la question : Hi my name is Eric Morgan and I m in 8th Grade honors math (middle) and I'd like to know how to prove the quadratic formula -b±sqrt of b(a)(c)over 2(a) Penny Nom lui répond. |
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Angles in Polygons |
1999-01-21 |
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Jen pose la question :
- How do u find the interior angles of a pentagon when you are given 4 of the angles and you need to find the fifth?
- If you are given the measure of each exterior angle of a regular polygon, how do you figure out how many sides the polygon has?
- i need all information on polygons and how to find their angles!!!
Jack LeSage lui répond. |
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Root 17 is Irrational |
1999-01-21 |
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John Murdock pose la question : If you could help me out with this I would appreciate it. Prove that the square root of 17 is irrational. Harley Weston lui répond. |
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Math and Writing |
1999-01-21 |
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Nancy Waite pose la question : This may not be an inquiry for this particular service, but we are searching for teacher resources incorporating writing into mathematics. With the new state math frameworks, our district is emphasizing using the writing process to develop thinking skills in math. We are gathering available resources in this area so we can begin formulating a plan to incorporate writing skills into the mathematics curriculum. Walter Whiteley and Rick Seaman lui répond. |
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