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Percentage increase |
2007-03-16 |
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From Gerry:
How do I figure the percentage between a small circle and a large circle
Answered by Penny Nom. |
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The question is whether the games is fair or unfair? |
2007-03-15 |
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From kk:
Players have two red chips each with an A side and a B side, and one blue chip with an A side and a B side.
The players flip all three chips. Player one wins if both red chips show A, if the blue chip shows A, or if all chips show A.
Otherwise player two wins. The Question is: Whether the games is fair or unfair and to draw a probability tree to show the answer.
Hope you can help
Answered by Haley Ess. |
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Choosing numbers with no two consecutive |
2007-03-15 |
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From Meghan:
How many combinations are there of 3 numbers chosen from 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 but where no 2 of the 3 numbers are consecutive?
Thank you!
-Meghan
Answered by Penny Nom. |
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An isosceles Triangle |
2007-03-15 |
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From Devon:
The length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the perimeter is 29 cm, find the length of one of the equal legs.
Answered by Stephen La Rocque. |
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Triple angle tangent formula |
2007-03-15 |
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From sam:
Hi I am trying to derive a triple angle formulae for tan. I know i need to use compound and double angle formulae but am finding it difficult to "clean" up my fraction to get the triple angle formulae can you show me a worked derivation?! thanks
Answered by Penny Nom. |
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Circles and chords |
2007-03-15 |
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From Henry:
Where do you place a chord in a circle such that it divides the area
of the circle 1/3 and 2/3? Also, what is the length of the chord?
Answered by Stephen La Rocque. |
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Two busses |
2007-03-15 |
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From Devon:
A bus leaves a station at 1 p.m., traveling west at an average rate of 44 mi/h. One hour later a second bus leaves the same station, traveling east at a rate of 48 mi/h. At what time will the two buses be 274 mi apart?
Answered by Steve La Rocque and Penny Nom. |
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Le perimetre d un cercle |
2007-03-15 |
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From Martins:
Comment calculer le perimetre d un cercle sachant que le diametre et de 25 de plus que le perimetre
Answered by Claude Tardif. |
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Square metres, cubic metres and timber |
2007-03-15 |
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From remy:
our timber is in square meter , our supplier is using cubic meter,
how do I convert from cubic meter to square meter.
Many thanks
remy
Answered by Harley Weston. |
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The area of a property |
2007-03-14 |
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From Greg:
Hi my name is Greg. I have a piece of property I am trying to buy,
but need to find out the square feet of it first.
The four sides are unequal lengths and none at a right angle or
parallel. Here are the measurement in feet.
The base of the square is 29.12 feet in width.
The right side of the square is 44.33 feet high.
The top of the square is 28.80 feet in width.
The left side of the square is 46.20 feet high.
I have not done this math in ages and really need your help.
Answered by Harley Weston. |
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A pictograph |
2007-03-14 |
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From Angie:
I am confused! I have to include a title, labels, and a key: Here is the problem
Snickers 45
Kit Kats 65
Nerds 30
Kisses 50
Suckers 75
With the above information please help me make a candy pictograph
I would gladly like your help as my child is a second grader and can not tell me anything about a pictograph
Answered by Penny Nom. |
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Arrays |
2007-03-14 |
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From Charla:
My 3rd grader has been given a problem about mathematical arrays.
Name two smaller arrays you can use to find the product.
7 x 6=3D ____
Answered by Diane Hanson. |
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Negative exponents |
2007-03-14 |
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From cookie:
(2.50x^-3) - (3.0x^-1)
please show me how to do this. The answer in the book is 7.5 x ^-4
Answered by Penny Nom. |
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Cut a given sphere by a plane |
2007-03-14 |
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From Rory:
Cut a given sphere by a plane so that the volumes of the two segments formed shall be in a given ratio.
Show that in modern notation, this leads to the cubic equation
m(r+x)^2(2r-x)=n(r-x)^2(2r+x)
where r is the radius of the sphere, x is the distance of the cutting plane from the centre of the sphere, and m/n < 1 is the given ratio.
Can you help me show the solution to this question. Thank you.
Answered by Penny Nom. |
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The dimensions of a rectangle with least perimeter for given area |
2007-03-14 |
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From Karlianna:
find dimensions of a rectangle with least perimeter for given area
A) 30cm2
b) 50cm2
Answered by Penny Nom. |
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