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30 articles trouvés pour ce sujet.

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	Accelerating to the speed of light		2004-09-30
		Lars pose la question : How long time would it take to accelerate up to the speed of light with an acceleration speed similar to 0-100 seconds in 5 seconds? Penny Nom lui répond.
	Trisecting an arbitrary angle		2004-04-06
		Joe pose la question : Where can I submit my effort on trisecting an arbitrary angle with only a straightedge and a compass? I can do it but I do not have the smarts to prove it.S Chris Fisher lui répond.
	Business trip		2003-12-19
		Ameer pose la question : A businnessman drives from Washington, D.C., to Boston, a distance of 442 miles, and then makes the return trip. On the way to Boston, he drives 65 miles per hour, taking an 1-hour rest stop during the drive. After finishing his business in Boston, he make the return trip driving at 60 miles per hour and takes a 45-minute rest stop halfway through the trip. Which leg of the journey, Washington, D.C. to Boston, or Boston to Washington, D.C., takes the longer time? Penny Nom lui répond.
	Factoring in		2003-12-16
		Priscilla pose la question : How can you use solving by factoring in real life applications? Harley Weston lui répond.
	Prescription drug coverage		2003-12-04
		Khadijah pose la question : Last week congressional approval was given to legislation involving prescription drug coverage for seniors. One summary of the legislation explains that it is estimated that in 2006 a senior will pay a premium of $35 per month, then pay their first $250 in pharmacy bills. After the bills reach $250, the coverage would pick up 75% of their bills that bring their total bills between the $250 and $2250 mark. After their bills reached a total of $2250, the senior would be responsible for all bills bringing their total annual bills between $2250 to $5100. Then any bills after the $5100 mark has been reached will be 95% covered by the insurance. Using this information, letís analyze the situation of a senior who accumulates $6000 in pharmacy bills over one year and has the insurance coverage. Over the course of this year, how many dollars will the senior pay? Penny Nom lui répond.
	Aristotle		2003-11-21
		John pose la question : I would like to know how aristotle was related to math. In all my searches I have found only philosophy etc. But not any math. Penny Nom lui répond.
	Maine and Nevada		2003-10-24
		Jimmy pose la question : From 1989 to 1990, the population of Nevada increased b y 157,000, and that of Maine increased by 30,000. In 1990, the population of Nevada was 1,206,152, and that of Maine was 1,233,223. If the populations of the two states continue to increase at the same rates, when will the populations of Nevada and Maine be the same? Write a verbal model for this problem Write an equation for the model Solve the equation and answer the question. Penny Nom lui répond.
	0.810 and 0.801		2003-10-24
		Ahmed pose la question : could you please tell me what is the greatest decimal fraction formed of the digits 0, 1 , 8? Is it 0.810 or 0.801, please give me the reason of the answer in details and the references if it possible. Penny Nom lui répond.
	Arithmetic in bases other than 10		2003-10-22
		Kim pose la question : how do you add, subtract, multiply and devide in base 3, base 5, etc? Penny Nom lui répond.
	Relatively prime		2003-09-27
		James pose la question : what is the definition a relative prime numbers? Penny Nom lui répond.
	Applications of logarithms		2003-09-16
		A student pose la question : I have a project due in my algebra two class dealing with logs and where they are used in life, but I am having trouble finding websites that relate. So I would really appreciate it if you couldhelp me. Penny Nom lui répond.
	Why is 5 to the 0 power always 1?		2003-08-24
		Crystal pose la question : Why is 5 to the 0 power always 1? Penny Nom lui répond.
	Inserting a comma ever three digits		2003-07-25
		Linda pose la question : when writing a large number, why do we insert a comma every three numbers instead of every two or four numbers? Penny Nom lui répond.
	A wooden deck around a pool		2003-07-09
		Dat pose la question : A pond is enclosed by a wooden deck that is 3 feet wide. The fence surrounding the deck is 100 feet long. If the pond is square, what are its dimensions? If the pond is rectangular and the length of the is three times its width, what are the dimensions of the pond? If the pond is circular, what is the diameter of the pond? Which pond has the most area? Penny Nom lui répond.
	38 minus 10 plus 12 divided by 4 times 16		2003-04-23
		James pose la question : please help me work this math problem 38 minus 10 plus 12 divided by 4 times 16 Harley Weston lui répond.
	Monomials		2003-03-11
		Roxy pose la question : Explain why (x+y)z is not equal to xz+yz? P.S. Z is an exponent Penny Nom lui répond.
	Splitting weight		2003-02-10
		Jin Ho pose la question : A balance scale has only two weights, 1 ounce and 4 ounces. In only three weighings split 180 ounces of seed in two bags of 40 and 140 ounces. Penny Nom lui répond.
	A train with 2 cars		2003-02-04
		Michael pose la question : A train with 2 cars is traveling at a speed of 80 km/hr from town X to town y, located 800 km from each other. At the same moment that the train departed, a passenger started to walk back and forth from one end of car B to the other at a speed of 100cm/sec. Arriving in town Y, the passenger had already gone and returned 720 times. The length of car A is that of car B plus one fourth of the length of the locomotive, and the length of the locomotive equals the length of Car A plus one fifth of the length of car B. What is the total length of the train? Penny Nom lui répond.
	The cousin of Sally's sister's boyfriend		2003-01-23
		Michael pose la question : Sally went to a farm to buy eggs. Returning home, she gave half of them to her sister who, in turn, gave a third of those she had gotten to her boyfriend. The latter, after eating one third of the eggs that he had gotten, gave the rest to his cousin. Given that each egg weighs 70 grams, that Sally cannot carry more than 2.5kg, and that the eggs were raw, calculate how many eggs the cousin of Sally's sister's boyfriend received. Penny Nom lui répond.
	Why quadratic?		2003-01-21
		Dan pose la question : Why are equations of the form aX2 + bX + c =0 call quadratic? The quad indicates 4 but the power is 2. Penny Nom lui répond.
	What is larger than infinity?		2003-01-12
		Dana pose la question : What is larger than infinity? Claude Tardif and Harley Weston lui répond.
	Odd and even		2002-12-17
		Martin pose la question : I am a graduate engineer trying to teach single digit addition to my 8 year old grand-daughter. My questions follow. Assume a child does not know what multiplication and division are. Assume the child knows how to count from 0 to 10 How do you explain that 2, 4, 6, 8 and 10 are even numbers And 1, 3, 5, 7 and 9 are odd numbers And these three facts? when you add two even numbers, the answer is even when you add two odd numbers, the answer is even when you add an even number and an odd number, the answer is odd? Can all of these be reasoned out, without using the concepts of multiplication or division? Diane Hanson lui répond.
	A linear function		2002-09-09
		Chad pose la question : If y = 9x - 13 does it represent a linear function? And if it does what is its slope and is it a direct variation? Peny Nom lui répond.
	Isoperimetric quotients		2002-01-02
		A student pose la question : I'm stuck on my GCSE Maths coursework, what do isoperimetric quotients measure? Penny Nom lui répond.
	Can a infinite set be smaller than another infinite set?		2001-11-29
		Carlos pose la question : Can a infinite set be smaller than another infinite set? If so why? Chris Fisher and Penny Nom lui répond.
	Divisibility rules		2001-09-07
		A student pose la question : Why is it that when you add the digits of a number you can tell what the multiples of that number are. Example: 12131313111, 1+2+1+2+1+3+1+1+1=18, therefore 12131313111 is divisble by 2, 9, 18, & 3 because those numbers are divisble by 18. Penny Nom lui répond.
	e^pi > pi^e		2001-07-27
		Dusty pose la question : What book(s) contain a proof that ePi > Pie? I think it might be in Problems in Analysis published by Springer-Verlag but I have not been able to check. Chris Fisher lui répond.
	5+5+5=550		2001-06-11
		Tom pose la question : I am in algebra and my teacher gave us an equation that was not true. she told us that we could only use one line segment(it can't bend turn has to be straight) to make the equation true. here is the equation: 5+5+5=550. i have not figured it out but have tried many things and believe it is not mathmatical but cross a # or sign out.also i forgot you can't put a slash mark through the equals sign. Penny Nom lui répond.
	Graphing equations		2001-05-01
		A student pose la question : If, for example, 4x2-12x+9=0 and -4x2+12x-9=0, which I'm assuming it does since you can derive that equation from the first, why do those two equations have different graphs? Penny Nom lui répond.
	Squares of Fibonacci numbers		2001-04-24
		Vandan pose la question : What discoveries can be made about the sum of squares of Fibonacci's Sequence? Penny Nom lui répond.

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