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How far is it from the top to the bottom of the mountain? |
2008-05-09 |
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Matthew pose la question :
A ski lift carries a skier up a slope at a rate of 2 miles per hour. Following the same path down the mountain, the hiker has a rate of 4 miles per hour. If the round trip took 3 hours, how far is it from the top to the bottom of the mountain?
Penny Nom lui répond. |
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The surface area of a tank |
2008-05-09 |
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jack pose la question :
i'm looking for the square footage of a tank that is 10'diameter x 23'high,floor,ceiling and walls
Penny Nom lui répond. |
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A linear model |
2008-05-09 |
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Shelby pose la question :
How would you write a linear model to represent the population of a city that has a population of 547,725 and a growth rate of -25,195 per year with t represents the number of years since 1994?
Penny Nom lui répond. |
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Rounding |
2008-05-09 |
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wendell pose la question :
write a three digit number that when rounded to the nearest ten and the nearest hundred, the answers are the same
Penny Nom lui répond. |
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Excluded values |
2008-05-09 |
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Andrew pose la question :
Finding Excluded Values
j+1
----
2j-6
Penny Nom lui répond. |
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The volume of a ditch |
2008-05-09 |
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Dixie pose la question :
I need to find the cubic feet of a ditch 36 inches wide by 28 inches high, by 1561 feet long.
then I need to convert it to cubic yards then to tons. of rock
Penny Nom lui répond. |
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A quadrilateral |
2008-05-08 |
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reena pose la question :
two exterior angles quadrilateral are 100 degrees 110 degrees each. two remaing interior one angle twice size other find size of each angle
Penny Nom lui répond. |
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6 things from 45 things |
2008-05-08 |
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Hakan pose la question :
Hi im a student studying advanced mathematics and i would like to know how many
possible sequences of six digits there are using the numbers from 1 to 45 (1 & 45 are
included) but none of the sequences can be identical even if the numbers are in
different orders.
Example : 1,2,3,4,5,6
2,3,4,5,6,1 these two sequences are identical even though the digits have
changed their order so therefore is incorrect.
I would like to know the easiest way to write these sequences along with how
many there are. This is extremely important for my year 12 exams Thank You.
Penny Nom lui répond. |
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How can the distance between two points be irrational? |
2008-05-07 |
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Dawn pose la question :
Yesterday my advanced 7th grade pre-algebra students were finding the distance between two points on a coordinate grid using the distance formula. A student asked me how come we or math I guess is able to represent a finite distance with an irrational number. I found this to be a very interesting question. I and the 7 other math teachers on my staff had discussed this and we have a variety of thing to say to the kid, but nothing that amounts to an actual answer. The students have studied what it means for a number to be irrational, and they cannot understand how that can "measure" a line that obviously stops. Got any suggestions?
Stephen La Rocque, Penny Nom, Claude Tardif and Victoria West lui répond. |
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seven + eight = twelve |
2008-05-07 |
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evelyn pose la question :
My son's teacher has given the children this question to answer and I do not have an anser.
seven + eight = twelve
Stephen La Rocque lui répond. |
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An isosceles triangle |
2008-05-07 |
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Jay pose la question :
Given: An Isosceles Triangle with the area=16m squared. What would be the length of each leg.
Stephen La Rocque lui répond. |
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The sides of an octagon |
2008-05-07 |
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Frank pose la question :
Question from Frank, a parent:
Hi,
Need to lay out a 10 ft. diameter octagon on the ground. What is the
length of the
sides ? And the angles ?
Harley Weston lui répond. |
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The factor theorem |
2008-05-06 |
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Nomaan pose la question :
factorise
x³-2x²-x+2
using factor theorem
Penny Nom lui répond. |
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A net for a hemisphere |
2008-05-06 |
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Julie pose la question :
how would you draw the net of a hemisphere?
Walter Whiteley lui répond. |
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Factor ac^2 - a^3 - a^2b + ab^2 + b^3 - bc^2 |
2008-05-05 |
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erson pose la question :
factorize:
ac^2 - a^3 - a^2b + ab^2 + b^3 - bc^2
Harley Weston lui répond. |
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