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The degree of a polynomial |
2015-01-05 |
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Nichole pose la question : How do I determine the degree of polynomials? I've searched this on sites but they are
all so confusing! Is there a simple explanation or way to find what the degree is? Some
examples are: 6x^4 10x^2yz^5 and 3m^2n^7-10m^8. I also have to say that I am
under the impression that this symbol ^ means the number after it is an exponent. Robert Dawson and Harley Weston lui répond. |
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A silo is composed of a hemisphere and a cylinder |
2015-01-03 |
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Ami pose la question : A silo is composed of a hemisphere and a cylinder. The total height for the silo is 20m and the diameter of the silo is 8m. What is the volume of the silo to the nearest cubic meter? Penny Nom lui répond. |
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Filling a tub |
2015-01-02 |
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Mr pose la question : The cold tap can fill a bath in 5minutes,the hot tap in 15,and the waste pipe empty the full bath in 10 minutes. All three are fully open for 2 minutes,after which the waste-pipe is closed. How much longer will it take to fill the bath? Penny Nom lui répond. |
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1 + 2 + 3 + ... + (2n - 1) |
2015-01-01 |
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Brian pose la question : Hi Maths Central
My wife presented me with a query which may have a simple answer, but one that I can’t deduce or explain.
Take the string of numbers, n=1,2,3,4,5…
It seems that n(2n-1) = Sum((1…..(2n-1))
e.g. for n=5, both 5 x 9 and Sum(1….9) equal 45, and so on for other values of n.
Could you please provide an explanation? Does it have an underlying reason and a name?
Look forward to your response.
Brian Penny Nom lui répond. |
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An isosceles triangle |
2014-12-31 |
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ahmadmahmoud pose la question : an isoseles triangle is such that each of the base angles is twice the vertical angle.Find the angles of the triangle Penny Nom lui répond. |
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1.5% of 1 trillion |
2014-12-30 |
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Kgosi pose la question : How much is 1.5% of 1 trillion? Penny Nom lui répond. |
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Rates, percentages and units |
2014-12-30 |
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Kenneth pose la question : Hello:
If percentages have no units, why are some percentages called rates, as in interest rate, or
perhaps a tax rate of 7% as an example? A rate has units of different quantities.
I thank you for your reply. Robert Dawson lui répond. |
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Curvature of the Earth |
2014-12-29 |
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Jimmy pose la question : Both batteries died in my scientific calculator and I have lost my formula for the heigth of the curvature of the earth between two points on the surface. I used degrees and miles. I only had to enter the distance between the two points on the surface and the formula gave me the hieght the earth raised between the two points. Robert Dawson lui répond. |
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196 kilometer in2 hours |
2014-12-29 |
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Ekanem pose la question : QQ A motorist had planned to reach a place 196km in two hrs exactly. For the first 15km he was able to average only 40km/h. What average speed must he keep up for the rest of the journey if he is to arrive on time. Penny Nom lui répond. |
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The perimeter of a quarter circle |
2014-12-26 |
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Maisy pose la question : This is the question that I got for a math worksheet.
The radius of a quarter circle is 5 miles. What is the quarter circle's perimeter?
Use 3.14 for pi. Penny Nom lui répond. |
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A trip to Ottawa from Toronto |
2014-12-22 |
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Kristy pose la question : A trip to Ottawa from Toronto will take 4 1/2 hours. Assuming we are 2/3 the way there, how
much longer will the trip take? Penny Nom lui répond. |
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A tangent to a circle |
2014-12-22 |
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azman pose la question : Find the equation of the tangent line to the circle x^2+y^2=9 at the point P (2, square root of 5). Penny Nom lui répond. |
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Discount |
2014-12-20 |
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nirmala pose la question : A bag is marked at rs 800 and is sold for rs 68. Find the rate of discount Penny Nom lui répond. |
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211basex=152base8 |
2014-12-15 |
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Humaira pose la question : 211basex=152base8 Penny Nom lui répond. |
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A line segment of length root 5 |
2014-12-15 |
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angela pose la question : On the dot grid below, draw and label a line segment with length square root 5
the dot grid is 8 by 10 Penny Nom lui répond. |
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