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Three dice |
2004-05-10 |
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A student pose la question :
If one has 3, 6 sided dice what is the probability of the numbers that are rolled to total 4 through 10 inclusively?
Subsequent to this, what is the probability to do this consecutively...say 3 times?
Peny Nom lui répond. |
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Pi |
2004-05-10 |
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Kim pose la question :
I'm a 7th grader at Lakeside Middle School. And I was wondering if you can answer a question for me for my math project. I'm doing a project on pi, and my teacher said to ask an expert like you to ask about how you would use the subject, pi, in real life usage. How would you use pi in real life usage?
Penny Nom lui répond. |
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Why the word combinations? |
2004-05-05 |
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Megan pose la question :
Why are locker combinations called locker combinations not locker permutations. The order of the numbers matter so why aren't they called locker permutations.
Claude Tardif and Penny Nom lui répond. |
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Chi-Squared |
2004-05-05 |
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Gillian pose la question :
OF75 PEOPLE, 43 ARE EXPOSED TO A VIRUS AND BECOME ILL. 11 PEOPLE ARE EXPOSED AND DO NOT BECOME ILL. 3 PEOPLE ARE NOT EXPOSED AND BECOME ILL. 18 PEOPLE ARE NOT EXPOSED AND DO NOT BECOME ILL. THE ATTACK RATE IS 80% FOR THOSE EXPOSED AND 14% FOR THOSE NOT EXPOSED. THE RELATIVE RISK IS 5.7. CAN YOU EXPLAIN TO ME HOW TO CALCULATE A CHI SQUARE TEST FROM THIS.
Penny Nom lui répond. |
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3x squared - 27 / x + 3 |
2004-05-04 |
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Stef pose la question :
3x squared - 27 / x + 3
Penny Nom lui répond. |
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A 3 digit number divisible by 7 |
2004-05-03 |
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A student pose la question :
We need to arrange 1,3 and 6 to form a 3 digit number that is divisible by 7.
Penny Nom lui répond. |
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Solving inequalities |
2004-05-03 |
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Joe pose la question :
Let x be a real number find and graph the solution to the following sentances:
2x-10+9
4X+2<15
5X+3>(x-1)
Peny Nom lui répond. |
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A clock chimes 7 times in 7seconds |
2004-05-02 |
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Anna pose la question :
A clock chimes 7 times in 7seconds. how long does it take the clock to chime 10 times?
Penny Nom lui répond. |
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The equation of a line |
2004-04-30 |
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Amy pose la question :
Write the equation of the line that contains the point (-4,6) and is perpendicular to the line y=5x+100.
Penny Nom lui répond. |
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Setting up an equation |
2004-04-30 |
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Matt pose la question :
I am trying to determine the dimensions of a 22 megapixel digital camera chip that has a 3:2 ratio. We know then, that: 3x = 2y (or 1.5x = y)
and that
xy = 22
Beyond this, I don't know how to hook those 2 seemingly unrelated facts together.
Penny Nom lui répond. |
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The sum of 4,0,-4..., -156 |
2004-04-28 |
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Christina pose la question :
find the requested sum of the arithmetic sequence
4,0,-4..., -156
Penny Nom lui répond. |
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Yards in a concrete driveway |
2004-04-27 |
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Bobbi pose la question :
I am wondering how many yards of cement I need for a 49 by 45 area, 5 inches thick. I am a stay at home mom who is not very good at math and I want to pave my drive way. Also what would the yardage be for a 6 inch thick drive way with the same area.
Penny Nom lui répond. |
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Factoring |
2004-04-27 |
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Bipin pose la question :
FACTORISE:
a to the power of 6 + b to the power of 6
Penny Nom lui répond. |
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An oil-drilling platform |
2004-04-27 |
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Alie pose la question :
An oil-drilling platform is located in the Gulf of Mexico 3.25 miles from the nearest point on shore. From a point B on the shore due east of A the bearing of the platform is S51.2W. How far is it from B to the platform?
Penny Nom lui répond. |
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The height of a triangle |
2004-04-27 |
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Danielle pose la question :
what is the definition of height of a triangle?
Penny Nom lui répond. |
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