Voici les articles les plus récents de notre base de données:
nouvelle recherche

		Page 825/886

	Central Limit Theorem and Law of Large Numbers		2000-06-26
		Jonathan Yam pose la question : The Central limit Theorem states that when sample size tends to infinity, the sample mean will be normally distributed. The Law of Large Number states that when sample size tends to infinity, the sample mean equals to population mean. Is the two statements contradictory? Paul Betts and Harley Weston lui répond.
	Cascade		2000-06-22
		Peter Bengtsson pose la question : Can you help me find an equation for this correlation? 2*1+1 3*2+0 4*2+2 5*3+0 6*3+3 7*4+0 8*4+4 9*5+0 10*5+5 This is the way scores are calculated when you play the game Cascade. The more number of balls you manage to "click away", the better score you get. So, I wrote down lots of results for different amount of balls I clicked away. Clicking away one pair (two adjacent) of balls means 3 points. Clicking away three adjacent balls means 6 points. etc. You can see this from the list above. What I now want to do is to find an equation with only ONE unknown! Y= kn*X+c or something. Whereby I only know X, I can find Y. Penny Nom lui répond.
	A bar over a Roman numeral		2000-06-21
		Charles Fontaine pose la question : Is there any significance to the bar placed over some Roman numerals? Penny Nom lui répond.
	Cairo tesselation and Archimedean duals		2000-06-21
		Joyce DuVall pose la question : I am looking for a picture of the Cairo tesselation, and pictures of the Archimedean duals. Do you know of any good web sites or books? Penny Nom lui répond.
	Lines on an oscilloscope screen		2000-06-20
		Janis Watson pose la question : What are the proper names for the vertical and horizontal lines on a graph? I am trying to explain an oscilloscope screen, and I don't know what to call these, except "vertical lines" and "horizontal lines." Penny Nom lui répond.
	The speed of light		2000-06-19
		Benny Lau pose la question : I have a personal questions. In physics,if a person is running on a train, his relative speed on the ground will be the addition of the speed of train and the person. If u have a train inside another train and inside another train, so on...... can u reach the speed of light? It would need a very long distance. But if we make all the train travel in circles. Then we don't need that much distance. So can we achieve the speed of Light? Robert Coleman and Harley Weston lui répond.
	Numerator and denominator		2000-06-18
		Maureen Beard pose la question : What is the origin of the terms numerator and denominater? Penny Nom lui répond.
	Combien y aura t il de 9 dans la réponse?		2000-06-17
		Marie pose la question : J'ai lu une énigme mais je n'ai pas la réponse."si l'on divise 123 456 789 par 999 999 999, combien y aura t il de 9 dans la réponse?" Claude Tardif lui répond.
	Names for large numbers		2000-06-16
		Mireille Carthier pose la question : I am trying to find the common names (in English and French) for the big numbers as follows: English French 106 million million 109 billion milliard? 1012 trillion billion? 1015 ?? trillion? Thank you very much Claude Tardif and Harley Weston lui répond.
	A sequence		2000-06-16
		Claire Hall pose la question : Can you find the formula for the pattern 4,12,24,40,60 AClaude Tardif lui répond.
	Simplifing		2000-06-15
		Angie Herbert pose la question : My daughter is having problems with her algebra homework. She is a year 7 pupil at high school in the UK. She has been given homework on simplifying formulae and she doesn't understand how to do them. Here is an example of one of the questions : 9s+7t+5c+5s-3t can you help her to understand how to do these and perhaps me too. Penny Nom and Claude Tardif lui répond.
	A percentage question		2000-06-15
		Michael Smith pose la question : I need a percentage for a business plan. How much is one-percent of two-hundred and thirty-nine million? Penny Nom lui répond.
	le nombre d'or		2000-06-14
		Belhaj Saad pose la question : quel est le nombre d'or? Claude Tardif lui répond.
	Rectangles and algebra		2000-06-13
		Kirstin pose la question : A rectangle's length is 4 more than twice its width. The area of the rectangle is 336m squared. What is its length? Paul Betts and Penny Nom lui répond.
	Two problems		2000-06-12
		Sharon pose la question : If f(4)=0 and f(6)=6, which of the following could represent f (x)? A. 2/3x-4 B. x+2 C. x-4 D. 3/2x+6 E. 3x-12 these are problems to study for a test so I need to know the answer and how it was solved! I have one more question If 180o < theta < 270o and tan theta = 4/3, then sin theta =? A. 5/4 B. -4/5 C. 3/5 D. 12/5 E. -3/5 Harley Weston lui répond.

		Page 825/886