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Transporting bananas |
2000-10-18 |
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Krystie pose la question : A farm has 45 bananas, a man has to take a truck and transport 15 bananas to a market that is 15 miles away. Every mile he travels, he must eat a banana. I have to get at least one banana to the market Penny Nom lui répond. |
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A chord length |
2000-10-17 |
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Al Paas pose la question : How to determine the length of a chord given the diameter of the circle and the maximum distance from the chord to The circle? Chris Fisher lui répond. |
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Multiplying decimals |
2000-10-16 |
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Lily pose la question : I need help with mutiplying decimals (example) 2.28*0.48( * = times). Harley Weston lui répond. |
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Area of shapes |
2000-10-14 |
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Melanie pose la question : What is the formula to calculate the area of different shapes? Harley Weston lui répond. |
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2-step equations |
2000-10-11 |
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Jen pose la question : i don't get how you find the answer to these equations 140= -4 -12e x/-2 + 6 = 4 Penny Nom lui répond. |
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Where will we use this in the real world? |
2000-10-11 |
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Jane Ann Musgrove pose la question : As a teacher of mathematics, I am always asked "Where will we use this in the real world?". I am seeking ideas/sites via the internet where students can find answers to this type of question. Can you help me? To be more specific, right now I am interested in finding careers where the employees would use the concepts of "Radicals", "Matrices", and "Logarithms". This information will be used by students to make presentations to the class on their findings from internet searches. Harley Weston lui répond. |
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Larger and smaller |
2000-10-10 |
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Nicole pose la question : which one of these arrows < , > points to the greater number? which arrows points to the smaller number. Penny Nom lui répond. |
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The sum of the cubes is the square of the sum |
2000-10-10 |
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Otoniel pose la question : Without using mathematical induction, or any other method discovered after 1010 a.d. , prove that the sum of i3, (where i, is the index of summation) from one to, n, is equal to ((n*(n+1))/2)2 Penny Nom lui répond. |
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Hendecagon |
2000-10-09 |
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Jillian pose la question : I need an example of a object that is in the shape of a hendecagon. I know what the shape is but I cannot come up with a real life example of an object that is this shape. Chris Fisher lui répond. |
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Sunflower seeds |
2000-10-09 |
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A parent pose la question : Find the number of 3/4 pound of sunflower seeds that can be filled with 225 pounds of sunflower seeds Penny Nom lui répond. |
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Independent tests |
2000-10-07 |
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A student pose la question : If the false-positive rate of each test in a battery of tests is 0.05, how many independent tests can be included in the battery if we want the probability of obtaining at least one false-positive result to be at most 0.2? Harley Weston lui répond. |
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Repeating decimals |
2000-10-06 |
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Mary O'Sullivan pose la question : I understand that with repeating decimals (those with a pattern), the number of digits repeated is put into fraction form with the same number of 9's ex. 0.4444 = 4/9 0.145145145 = 145/999 How can I explain why this is so? Some inquisitive 8th graders are anxious to find out! Penny Nom and Walter Whiteley lui répond. |
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Cutting the cake |
2000-10-05 |
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Cherie pose la question : How can you divide a cake (circle) into 14 pieces by using only 4 straight lines? Penny Nom lui répond. |
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Pillows and Cushions |
2000-09-27 |
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Fiona pose la question :
The following problem was given to grade eleven algebra students as a homework assignment. To manufacture cushions and pillows, a firm uses two machines A and B. The time required on each machine is shown. Machine A is available for one full shift of 9.6 hours. Machine B is available for parts of two shifts for a total of 10.5 hours each day. Harley Weston lui répond. |
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Isolating an exponent |
2000-09-24 |
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C. Scott pose la question : Suppose you invest $500.00 in an account that pays 10% interest compounded annually. How long will it take for this value to triple? A=p(1 + i)a A=1500 i=0.1 1500=500(1.1)a p=500 a=unknown How do you solve this problem algebraicly? How do you isolate the variable (a) when it is an exponent? Harley Weston lui répond. |
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