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Two line segments and a plane |
2003-09-11 |
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From Laura: Do all figures made up of two segments lie in a plane? Answered by Penny Nom. |
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Area of a rectangular room |
2003-09-11 |
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From Kelly: The area of a rectangular room is 238 square feet. The width is 3 feet less than the length. What are the dimensions? Answered by Penny Nom. |
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The general equation for a sphere |
2003-09-11 |
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From Jaidev: Is there any general equation for a sphere? Answered by Penny Nom. |
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The mean house price |
2003-09-10 |
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From Carol:
Question: I have to find the mean from the following example: Price Range £000 | No of Houses | 55 and under 60 | 3 | 60 and under 65 | 6 | 65 and under 70 | 13 | 70 and under 80 | 21 | 80 and under 100 | 15 | 100 and under 130 | 7 | 130 upwards | 1 | I know when calculating the mean you use the mid points of the classes, but how does this work for the 130 upwards class? Also, does this still work given the difference in the classes (ie. 1st class is 5, 5th class is 20, etc). Any help to get me started would be greatly appreciated. Answered by Penny Nom. |
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Converting from base 10 to base 5 |
2003-09-10 |
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From Susy:
My son, who is 9 in grade 5 has been asked to convert base 10 numerals into base 5. His first question of: 24(10) he has calculated to be 4x5 + 4x1 = 44 (5) The next question however is the tricky one.İ We know the answer is supposed to be 100 but we find it difficult to get this in the way he understands it. 25 (10) = _________________ 100 (5) Can you help us figure out how we reach the answer. Answered by Claude Tardif and Penny Nom. |
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How high does the sequence of numbers go |
2003-09-07 |
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From Shayna: My quetion is "How high to the sequence of numbers go"? e.g. one, ten, hundred, thousand, million, billion, trillion, and from there is my queston. Answered by Penny Nom. |
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Making a square |
2003-09-07 |
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From A student: if I am given any number (say 80 for example), how may I determine the smallest whole number integer which when multipled by it will yield a square number ? In other words if I express this as: 80İ*İnİ=İsquareİnumber, what is the least value of n which will yield a square. Answered by Penny Nom. |
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Consecutive integers |
2003-09-07 |
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From Amy: I was wondering if there was a proper way to write the solution to a problem requiring consecutive integers? Is it okay to write the solution as 5,4,3,2,1 or must it be written as 1,2,3,4,5? Answered by Penny Nom. |
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Order of operations |
2003-09-07 |
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From Brian:
It has to do with the 4 rules of operations, Parentheses first before operations outside/evaluate all exponential expressions/all multiplication and divisions/then all additions and subtractions. Who made these rules and when did they make them,,, I know its somewhat of an unorthadox question but I must know. I would really appreciate it. Answered by Penny Nom. |
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7,473,000,000 divided by 52000 |
2003-09-06 |
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From A student: I am having trouble with a question. 7,473,000,000 divided by 52000. Our calculater gets 147311.5385. I come up with 143711.53846, and then the number starts to repeat itself Answered by Penny Nom. |
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Can 2 vertical planes intersect? |
2003-09-06 |
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From Erin: My question is can 2 vertical planes intersect? Answered by Penny Nom. |
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One million seconds |
2003-09-04 |
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From Vince: If you can write a number each second for one million seconds, how many hours would it take? Answered by Penny Nom. |
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Four digit combinations |
2003-09-04 |
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From Emma: I seriously need to find out all the four digit combinations from 0 to 9!!! My name Is Emma Dibitt and I'm going into 8th grade and I'm a student!!! Answered by Penny Nom. |
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Grooming the king's horses |
2003-09-04 |
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From Janelle: the stable boy had 90% of the kings horses groomed.the next day the king acquired 25% more horses. Now there was 105 horses not prepared for the kings men. How many horses did the king originally have? Answered by Penny Nom. |
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A 16 foot ladder |
2003-09-04 |
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From Kelly: Two buildings are separated by a three-foot alleyway. Fatima wants to use a 16 foot ladder to reach a window in the wall of one of these buildings. If she places the foot of the ladder against the base of the other building, how far up the wall will the top of the ladder reach?? Answered by Penny Nom. |
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