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Optical illusions |
2000-12-06 |
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From Jessica:
Hi, my name is Jessica, 7th grade, and Im doing a Math Fair project on optical illusions. As one of the required factors, we need a "mathmatical significance" paragraph. Unfortunatley, I can only think of one way that optical illusions have to do with math, and thats time because some optical illusions tell you to look at the picture for a certain amount of time.
Answered by Penny Nom. |
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< and > Which one is which? |
2000-12-06 |
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From Alice:
This grandmother forgot and wants to know the correct for greater and the one for lesser..... the two are < and > Which one is which?
Answered by Penny Nom. |
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A point that a group of lines pass through |
2000-12-05 |
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From Ross:
A point that a group of lines pass through is called a________?
Answered by Chris Fisher. |
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Scheduling a golf vacation |
2000-12-05 |
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From Michael:
I'm having a problem scheduling matches for a golf vacation. We have 12 people playing 7 rounds of golf in 7 days. We play 2 man teams vs. 2 man teams everyday.Is there a formula so that you play WITH a different partner everyday and AGAINST as many different people as possible? Thank You for any help you may be.
Answered by Penny Nom. |
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Calculating your grade |
2000-12-04 |
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From Jack:
I got an 80 on test 1 and a 65 on test 2. The first test is worth 35% of our total grade and the second is worth 40%. What is my grade right now?
Answered by Penny Nom. |
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The aspect ratio of a rectangle |
2000-12-04 |
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From Ron Delavigne:
The aspect ratio of this rectangle is 4:3. That is A to B is 3. And B to C is 4. If I know the lenght of A to C is 19 inches, how can I find the length of A to B, and B to C.
Answered by Penny Nom. |
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Parabolas in life |
2000-12-03 |
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From Ashley:
I am a student and my teacher recently gave us the assignment of writing a portfolio on parabolas in life and finding examples, three to be in fact, only we have to go into detail about only one. We have been instructed to include such terms as: axis of symmetry, completing the square, parabola, quadratic formula, standard form (vertex form) and vertex. We also must include in our detailed example an equation of the parabola and very specific details, PLEASE HELP!
Answered by Harley Weston. |
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Equivalent fractions |
2000-12-03 |
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From A student:
please explain to us how to find the answer to this problem, we need three fractions that name the same amount as 2
Answered by Penny Nom. |
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Estimating the time to complete a job |
2000-12-03 |
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From Jack Hook:
I'm a contractor and need to estimate how much time it will take me to do a specific job. A previous job I did was 6,480.16 Square Feet and I was able to paint it in 31.5 hours. In estimating my next job, how many hours will it take me to paint 11,000 Sqare Feet.
Answered by Penny Nom. |
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A non-integrable function |
2000-12-03 |
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From Mark Spilker:
I have a proof that I cannot do here it goes.
Let F(x)= 1 if x is a rational number 0 if x is an irrational number Prove the function is not intregrable on the interval (0,1). Hint: Show that no matter how small the norm of the partition, the Riemann Sum for the SigmaNotation F(wi) DeltaiX is not unique.
Answered by Harley Weston. |
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Two more problems |
2000-12-01 |
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From Michael:
first question:
The mean of three test grades is 74. What must a fourth grade be to increase the mean to 78? final question:
The product of two consecutive odd positive integers added to their sum is 119. What are these two integers?
Answered by Claude Tardif. |
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Triangles and trigonometry |
2000-11-30 |
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From Mose:
If I have a right triangle, and I know the lengths of all three sides, is there a formula that will allow me to determine the measurements of the 2 non right angles?
Answered by Harley Weston. |
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A 16 slice pizza |
2000-11-30 |
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From A student:
What is 5/8 of a 16 slice pizza?
Answered by Penny Nom. |
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An integration problem |
2000-11-30 |
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From A student:
If a>0 and the integral from b to 0 of 1/(1+x) equals 1/2 the integral from a to 0 of 1/(1+x), express "b" in terms of "a"
Answered by Claude tardif. |
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The astronomers' calendar |
2000-11-29 |
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From Show_Li:
The calendar that astronomers use began on Jan. 1, 4713 B.C. on that day, the julian calendar, the lunar calendar, and roman tax system calendar all coincided. This won't happen again until 3267 A.D.
(a). How many years ago was the astronomer's calendar started?
(b). Find the number of years between times that the three calendars coincided.
Answered by Penny Nom. |
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