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Finding a formula |
2000-05-05 |
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From Erica Hildebrandt:
If a farmer has a field and his plots are laid out in the following grid where each # represents a plot: | 4 | 5 | 12 | 13 | 20 | | 3 | 6 | 11 | 14 | 19 | | 2 | 7 | 10 | 15 | 18 | | 1 | 8 | 9 | 16 | 17 | Of course the plot numbers aren't meaningful as I have described above. In fact they may not be numbers at all. The only constants I have are the total number of rows and columns. Using the total number of rows and columns and my current position row and column, how can I write a formula that tells me column 3 row 3 = 10, column 4 row 2 = 14, etc. I can see the pattern but can't quite get the formula. I believe I will need 2 different formulas one for even and one for odd rows.
Answered by Paul Betts and Penny Nom. |
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An improper integral |
2000-05-04 |
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From A high school senior:
Hi, I am a high school senior and I need help stugying for a final. I am stuck on one of the questions on my review sheet. Does the improper integral from 5 to infinity of (38/97)x converge or diverge? If it converges I also need to know how to find the approximate value accurate to .01 of its actual value.
Answered by Harley Weston. |
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sin(7pi/12) |
2000-05-04 |
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From Kristel:
What is the exact value of sin 7pi/12?
Answered by Chris Fisher and Paul Betts. |
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Thearcius Functionius |
2000-05-03 |
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From Kevin Palmer:
With the Olympics fast approaching the networks are focusing in ona new and exciting runner from Greece. Thearcius Functionius has astounded the world with his speed. He has already established new world records in the 100 meter dash and looks to improve on those times at the 2000 Summer Olympics. Thearcius Functionius stands a full 2 meters tall and the networks plan on placing a camera on the ground at some location after the finish line(in his lane) to film the history making run. The camera is set to film him from his knees(0.5 meters up from the ground) to 0.5 meters above his head at the instant he finishes the race. This is a total distance of two meters(the distance shown by the camera's lens).
Answered by Harley Weston. |
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An indefinite integral |
2000-05-03 |
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From Bonnie Null:
I am to find the indefinite integral of: (ex - e-x)2 dx
Answered by Claude Tardif. |
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Mary Fairfax Greig Somerville |
2000-05-03 |
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From Joshua Garrett:
I'm giving a report in class on her life. Could i recieve some sort of information about her. thank you
Answered by Claude Tardif. |
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Why is 1/4 larger than 1/5? |
2000-05-02 |
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From Sherry:
I have to do a math project for my teacher education class. The question that I am working on is why is 1/4 bigger than 1/5.
Answered by Paul Betts, Claude Tardif and Penny Nom. |
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Minimizing the metal in a can |
2000-05-02 |
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From May Thin Zar Han:
A can is to be made to hold 1 L of oil. Find the dimensions that will minimize the cost of the metal to manufacture the can.
Answered by Harley Weston. |
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Matrices Information |
2000-05-02 |
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From William Avery :
I am an OAC student at Governor Simcoe Secondary School in St. Catharines Ontario. Today at school we were handed an independent study project by our Finite teacher. This assignment is based on Matrices, it involves performing some simple matrix calculations, but also involves a written section. This written section asks for the following:
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Answered by Marley Weston. |
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Area of an ellipse |
2000-05-02 |
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From Kaushal Shah:
How do I Calculate the area of a ellipse known the length of any related thing. Example, suppose if I know the length of latus rectum, major&minor axis etc.
Answered by Walter Whiteley. |
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la dimension fractale |
2000-05-01 |
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From François RIVOIRE, Julien CHOLLET et Alexandre DECOSTER:
nous sommes étudiants en première année MPSI en école d'ingénieur ISEN ( Institut supérieur d'électronique du Nord ). Nous avons choisi les FRACTALES ( ou plus précisément sur la dimension fractale et topologique ainsi que sur les suites logistiques) comme sujet de TIPE; serait-il possible que vous nous envoyez des démonstrations mathématiques ou des conseils car jusqu'ici nous avons eût beaucoup de mal à trouver des démonstrations se rapportant à ce sujet,
Answered by Claude Tardif. |
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Two calculus problems |
2000-05-01 |
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From Kaushal Shah:
How Do WE Integrate the following Functions, - Integral xtanx dx
- How was natural base "e" discovered and why e=2.7.......
Answered by Claude Tardif. |
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Fractals |
2000-04-29 |
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From Rachel Maginn:
What are Fractals? I am doing a research project. Any information would be great. I need to know the history behind fractals, and how they are used. I would like some examples like the snowflake and a fractal tree. Any other examples would be appriciated greatly.
Answered by Harley Weston. |
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What percent is one fraction of another fraction? |
2000-04-29 |
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From A student in grade 4:
What is the method for finding out what percent one fraction is of another fraction. For instance 4/5 is what percent of 1/9?
Answered by Penny Nom. |
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Monica's geometry problem |
2000-04-27 |
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From Monica:
Given: ABCD is a square; AX is perpendicular to BY
Prove: Angle 1 is congruent to Angle 3
Answered by Chris Fisher. |
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