13 articles trouvés pour ce sujet.
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What is -5 squared? |
2019-09-10 |
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Pori pose la question :
What is -5 squared?
Penny Nom lui répond. |
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Volume and Surface area of a sphere |
2019-05-03 |
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Caitlin pose la question :
Why does the surface area formula of a sphere have a squared radius while the volume of a sphere has a cubed radius?
Penny Nom lui répond. |
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What is -3 squared? |
2014-11-12 |
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Christine pose la question :
On a math test, it said "What is -3 squared?" It did NOT say "What's is (-3)squared"
The teacher's explanation is that if there are no brackets or parenthesis, you ALWAYS square the number first then do the negative, so the answer should be -9, but I can't find anywhere that confirms this.
Help please.
Robert Dawson lui répond. |
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5 square metres |
2007-03-28 |
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Allan pose la question :
please confirm if an area of 5 square metres is different from 5m^2 (5metres squared)
Penny Nom lui répond. |
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A statistics question |
2007-01-07 |
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Rick pose la question :
For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks and 10 percent were watching cable stations on a weekday night. A random sample of 500 viewers in the Tampa-St Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC affiliate, 140 to the CBS affiliate, 125 to the NBC affiliate, and the remainder were viewing a cable station. At the 0.05 significance level, can we conclude that the guideline is still reasonable?
Penny Nom lui répond. |
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A binomial squared |
2004-09-19 |
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John pose la question :
Can you explain the steps
for me, that get you from (a - b)2 to a2 -
2ab + b2
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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Can twice a square be a square? |
2003-03-25 |
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Mike pose la question :
The other day it occurred to some students that they could think of no square number which is an integer, which can be divided into two equal square numbers which are intergers, Or put another way, no squared integer when doubled can equal another square integer. For example 5 squared plus 5 squared is 50, but 50 is not a square number.
Walter Whiteley and Claude Tardif lui répond. |
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(a+b) squared and a squared plus b squared |
2001-11-14 |
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Kristen pose la question :
(a+b)2 = a2 + b2 Is this true for all whole numbers, and why?
Penny Nom lui répond. |
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Dots on squared paper |
2001-03-30 |
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Tom pose la question :
Consider some squared paper with lines 1cm. apart and dots where the lines cross. Place squares whose sides are whole numbers of centimetres on the paper in such a way that the sides of the squares always lie along the lines on the paper. For each square, find (a)the number of points inside the squares; (b)the number of points on the square and (c)the area of the square. How are these quantities related?
Leeanne Boehm and Penny Nom lui répond. |
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Exponents |
2001-01-14 |
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A student pose la question :
I am wondering if a number raised to the second power is "squared" and a number raised to the third power is "cubed" is there a name for any number raised to any other power.
Harley Weston lui répond. |
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Factoring trinomials that are squared |
2000-04-17 |
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A student pose la question :
I have a question that I really need an answer to. I need help with factoring trinomials that are squared.
Penny Nom lui répond. |
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2 to the x and x squared |
1999-09-17 |
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John pose la question :
For what values of x is 2 to the exponent x greater than x squared?
Harely Weston lui répond. |
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