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Cone story problem |
2011-04-16 |
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From Chelsea:
There is a cone with a story problem that states only that the radius is the same as the altitude and that the slant height of the cone is 6cm. I have no idea how to figure this problem out.
Answered by Penny Nom. |
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The equation of a sphere |
2011-04-16 |
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From kanika:
equation of sphere and how to know its center
Answered by Penny Nom. |
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Dividing a polygon into triangles |
2011-04-16 |
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From Foxie:
You have a given regular polygon with n vertices and you divide it into triangles(using the vertices of the polygon) which each share at least one side with the polygon. How many distinct ways can you divide the polygon if its vertices are numbered? For n=3 it's 1 way, for n=4 it's 2 ways for n=5 5 ways, I'm not quite sure but think that for n=6 it's 12 ways... thanks in advance!
Answered by Claude Tardif. |
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The volume of a triangular pyramid |
2011-04-15 |
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From Chelsea:
There is a triangular pyramid which is an equilateral on the base with all sides 16.5 and the height is 25. I have to find the volume. Please help!
Answered by Penny Nom. |
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A concrete walk around a pool |
2011-04-15 |
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From Skipper:
I want to know the answer if you were to want a pool to be 20 ft by 30 ft and wanted a 5 ft border around it what would be the dimension of the whole area plus concrete walk
Answered by Penny Nom. |
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Arrangements of ten letters |
2011-04-15 |
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From Mustafa:
In how many ways can the ten letters of the word GELATINOUS be arranged
in a line so that the vowels are in alphabetical order (not necessarily together)
when read from left to right?
Answered by Penny Nom. |
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A golf league of 60 golfers |
2011-04-14 |
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From Keith:
I have a golf league of 60 golfers and I want to have each golfer play in a different group of 4 each week for 24 weeks.
How can I do this
Answered by Victoria West. |
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Coefficient of variation |
2011-04-14 |
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From Braden:
When determining coefficient of variation (CV) or %CV is it possible to calculate %CV for two variables? For instance can %CV be used to determine the precision of 5 data points on a graph using the X and Y coordinates? or does %CV need to be determined for each variable separately?
Answered by Robert Dawson. |
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The volume of a hopper |
2011-04-13 |
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From michael:
I have a tank that is 72" x 72" at the top and 10" x 10" at the bottom
and is 31" tall. I need to calculate the cubic feet of the tank
Answered by Penny Nom. |
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Decreasing numbers |
2011-04-13 |
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From Hadi:
A number is called a "decreasing number" if each digit in the number is less than the digit to its left.
For example, 87420 is a deceasing number. How many five-digit
decreasing numbers are there?
Answered by Claude Tardif. |
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-1 = -sin^2x - cos^2x |
2011-04-11 |
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From veronica:
I need the solutions for -1 = -sin^2x - cos^2x
Answered by Penny Nom. |
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How far is it from the control tower? |
2011-04-11 |
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From Varun:
An aircraft is vertically above a point which is 10 kms west and 5 kms north of a control tower. if the aircraft is 4000 mts above the ground,how far is it from the control tower?
Answered by Penny Nom. |
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2 cubic foot bags of mulch |
2011-04-11 |
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From Ron:
if I buy 2 cubic foot bags of mulch, how bags would
I need to equal 1 yard? (13 bags?)
Answered by Penny Nom. |
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PEDMAS |
2011-04-10 |
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From Ross:
48 ÷ 2 (9+3)
Is the answer 2 or 288?
Answered by Harley Weston. |
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x/6 + 4/5 = x/9 |
2011-04-10 |
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From Khadija:
x/6 + 4/5 = x/9
Answered by Penny Nom. |
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