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A 24 hour clock |
2008-01-31 |
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From CARLA:
at a certain time i looked at a 24-hour digital clock and noticed some things about the time. (1 The number in the hours section plus the number in the minutes section makes 60.(2 One of the digits in the minutes section is the square root of the other digit in the minutes section.(3 The sum of the digits in the minutes section is the number in the hours section reversed. what is the time?
Answered by Penny Nom. |
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Determine the number of square inches for one piece of pie |
2008-01-31 |
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From Annie:
Ok i'm so lost it ain't even funny! HELP! Here's the question: A pie has a
radius of 7 inches and can be divided into 8 equal pieces. Determine the
number of square inches for one piece of pie. Explain your answer.
Answered by Penny Nom. |
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Fibonacci numbers |
2008-01-30 |
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From Beth:
You've answered a question for a Linda Bach on Oct. 25, 1999 that has to do with a pet rabbit and stairs. (Working Backwards) We were wandering if there is a formula we can use to plug the numbers in? My 7th grader got that exact same problem. I've spent several hrs trying to come up with a formula. I've tried the combinations formula, the Pascal's triangle and the Permutations formula. It seems like it is something real close to those, but can't quite get anything to work. What kind of formula would work for finding the outcome of this problem? Thanks so much for your help. Beth
Answered by Penny Nom. |
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A dependent variable |
2008-01-30 |
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From lavada:
i need the definition to dependent variable
Answered by Stephen La Rocque. |
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The standard form of a line |
2008-01-30 |
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From Thomas:
I'm attempting to get this in standard form
slope=3;(1,5)
Answered by Penny Nom. |
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Sum and difference of cubes |
2008-01-30 |
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From Amanda:
It has been a really long time since I was in Algebra and I can't remember how to factor cubes such as x^3 +81 or subtracting/adding fractions with variables such as [1/(x+h)+2]-[1/x+2]. Please help!!!
Answered by Penny Nom. |
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The acre measurement of a property |
2008-01-30 |
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From Kim:
I would like to know the acre measurement of a property that is 673.68 feet by 820.76 feet.
Answered by Penny Nom. |
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What solid figure has 1 flat surface and 0 vertices? |
2008-01-30 |
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From Cheronda:
What solid figure has 1 flat surface and 0 vertices?
Answered by Stephen La Rocque and Harley Weston. |
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Integration by parts |
2008-01-30 |
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From seth:
hi i really dont understand integr
ation by parts. for example, the integral(t^2sintdt. i have u=t^2 and v'=sint also u'=t^/3 v=-cost
for the formula i have uv-integralvu' dx this is all well and good but i cant get it right.
Answered by Harley Weston. |
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Percentage off |
2008-01-29 |
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From Donna:
What is the percentage of savings if you bought something for $34.00 that was originally priced at $37.60.
Answered by Stephen La Rocque. |
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(1x2x3x...n)+1 |
2008-01-29 |
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From Sayuri:
what is the smallest natural number n, greater than 1, for which (1x2x3x...n)+1 is not a prime?
Answered by Penny Nom. |
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Converting decimal fractions into common fractions |
2008-01-29 |
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From Donna:
Question from DONNA:
I need to change 6.9375 by 10.0625 into inches.
Answered by Harley Weston. |
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The interior angles of a parallelogram |
2008-01-29 |
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From amber:
the measure of one interior angle of a parallelogram is 42 degrees more than twice the measure of another angle. Find the measure of each angle.
Answered by Penny Nom. |
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Digging a pool |
2008-01-29 |
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From tom:
digging a pond 100ft by 70ft by12ft with a 2:1 side slope. how many cubic yards will be removed
Answered by Harley Weston. |
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Solving a cone |
2008-01-29 |
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From Marija:
[Note: this problem shows how to solve anything about a cone if you are given two measurements.]
Is there a formula for finding the diameter of the base of the cone?
Answered by Stephen La Rocque. |
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