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Bases larger than ten |
2009-12-14 |
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From Nick:
For numbers in bases larger than ten, what are the digits by mathematicians' conventions?
I assume the first 10 are always 0-9. I know two computer science conventions (for hexadecimal (A-F case-insensitively) and for base 85 (case-sensitivity plus 23 other characters)) and as a school student I learned that base 12 uses either T and E (which confused me when I thought they stood for Eleven and Twelve) or A and B, the latter as capitals only. Clearly, these conventions are in conflict.
I saw your reply in http://mathcentral.uregina.ca/QQ/database/QQ.09.99/magin1.html as accessed a few minutes ago but hope that in the 10 years since then mathematicians have arrived at a convention. Have they?
Thank you.
--
Nick
Answered by Claude Tardif. |
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A regular pentagon |
2009-12-14 |
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From Jamie:
A regular pentagon is inscribed in a circle of radius 4.5 cm.
Determine its perimeter and area to one decimal place!
Thank YOU ! :)
Answered by Penny Nom. |
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Decimal equivalent |
2009-12-13 |
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From Asia:
In a forest,it rained 36 out of 90 days. What is the decimal equivalent of 30 out of 90 days
Answered by Penny Nom. |
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4x +3/4 = 1/4 |
2009-12-12 |
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From Lynda:
4x +3/4 = 1/4
I know the answer is -1/8 but I don't know how to show the process of getting the answer
Answered by Penny Nom. |
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f(x)=x+2sinx |
2009-12-12 |
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From amroziz:
for which values of x does the graph of f(x)=x+2sinx have horizontal tangent
Answered by Harley Weston. |
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The volume of a compost pile |
2009-12-11 |
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From Tim:
I have a pile of compost that is78 feet long by 18 feet wide at base by 9
feet tall to a point. At the width it looks like a triangle
I'm looking for the square yards
Thanks
Answered by Penny Nom. |
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Three digit numbers |
2009-12-11 |
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From christopher:
i need a list of all 3 digit combinations with repeat of a number thnx
Answered by Penny Nom. |
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A number base that's not a positive integer |
2009-12-11 |
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From Nick:
Is it possible for a number to have a base that's not a positive integer?
Base 1 gives a result that's meaningless but possible. I have no concept of a base 0, a negative base, or a fractional base, never mind any other base. I think there isn't any base that's not a positive integer, but, knowing that math keeps jumping ahead and sometimes has inventions before anyone knows how to exploit them, I think I'd better ask.
Thank you.
Nick
Answered by Robert Dawson and Claude Tardif. |
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Two digit numbers |
2009-12-10 |
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From Jim:
Can you tell me how many 2 digit numbers can be created
from the following:
1118539
Answered by Penny Nom. |
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Dirt around a cylinder |
2009-12-10 |
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From curtis:
If I was to pile 3.5 cu. yds of dirt around a 5ft 6in. diameter cylinder within 24in. of the outside, how high will the dirt be?
Answered by Penny Nom. |
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A concrete slab |
2009-12-10 |
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From Mark:
there are 30 cubic yards of concrete, how many feet will it cover with a 4" slab?
Answered by Penny Nom. |
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The 3-ball lottery |
2009-12-09 |
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From Lee:
A friend and I are trying to calculate the odds of choosing the winning
numbers in the 3-ball lottery (3-digits 0-9).
We realize that there are 720 Permutations and 120 possible Combinations
of said lottery, but we're having trouble figuring how to determine the
"odds" or probability of winning (1) when order matters, and (2) when it
doesn't. Please help!
Answered by Penny Nom. |
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e = m c^2 |
2009-12-09 |
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From Jim:
Please explain the following formula:
E=MC2 (squared)
Answered by Robert Dawson. |
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Game of 24 |
2009-12-09 |
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From Tony:
Checked out all of the previous inquiries into the crazed game, and found none with these particular numbers: 1, 4, 6, 7. I've tried every method I can think of, please Help! Tks.
Answered by Robert Dawson, Penny Nom and Claude tardif. |
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... the original speed of the car was? |
2009-12-08 |
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From venkatesh:
A car travels a distance of 840 miles at a uniform speed if the speed of the car is increased 10 m/h more ,it takes two hours less to cover the same distance ,the original speed of the car was?
options:75 mh,65 m/h,60 m/h,55 m/h,45 m/h .
Answered by Claude Tardif. |
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