Sujet: variation liste de sujets
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27 articles trouvés pour ce sujet.

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	w varies jointly with the square of u and the cube of d		2013-01-26
		Desiree pose la question : i don't understand how to answer this 'w varies jointly with the square of u and the cube of d' Penny Nom lui répond.
	Coefficient of variation		2011-04-14
		Braden pose la question : When determining coefficient of variation (CV) or %CV is it possible to calculate %CV for two variables? For instance can %CV be used to determine the precision of 5 data points on a graph using the X and Y coordinates? or does %CV need to be determined for each variable separately? Robert Dawson lui répond.
	Proportionality		2010-02-27
		Nazrul pose la question : If a is proportional to b then how can I prove that (a^2-b^2) is proportional to ab. Please show me the process in details. ms. Dame and Tyler Wood lui répond.
	Proportionality		2009-11-03
		Nazrul pose la question : If x is proportional to y , how can I prove that (x^2-y^2) is proportional to xy. Please explain the process. Penny Nom lui répond.
	Proportionality		2009-06-29
		Nazrul pose la question : If x is proportional to y and y is proportional to z , how can I prove that (x^2+y^2)^3/2 is proportional to z^3 Harley Weston lui répond.
	Direct and inverse relationships		2009-04-06
		allison pose la question : A piece of string is cut into n pieces of equal lengths L (1) does n vary directly or inversely with L Penny Nom lui répond.
	Direct, inverse and indirect proportionality		2009-03-04
		Brian pose la question : My 14 year old is confused about indirectly proportional and inversely proportional. On searching on the internet we were directed to: http://mathcentral.uregina.ca/QQ/database/QQ.09.00/ellis1.html Here leanne starts explaining indirectly proportional and ends up describing inversely proportional. Has Leanne got it wrong ? What is indirectly proportional. Thanks Brian Chris Fisher lui répond.
	Coefficient of variation		2008-12-17
		JR pose la question : I have read your reponses regarding the coeffcient of variation (CV) and find them very useful. I still have a question about interpreting the CV. Let's that the CV of sample #1 is 3% and that of sample #2 is 12%. Can I report that Sample #2 is 4 times more variable than sample #1? Thanks in advance! Robert Dawson lui répond.
	Partial variation		2008-11-03
		Diamond pose la question : what are the 2 parts of partial variation? Penny Nom lui répond.
	Inverse variation		2008-05-22
		leria pose la question : In Boyle's law, the pressure of gas varies inversely with the volume of the gas. A volume of 11.2 liters of air exerts a pressure of 2.0 atmospheres. determine the constant of variation and write an equation the models the relationship between the pressure of the gas P and its volume, V. Use the equation to predict the volume of air necessary to exert a presure of 0.25 atmospheres. Janice Cotcher lui répond.
	Direct and inverse variations		2007-11-27
		Julie pose la question : Please Help I do not understand this question. X varies directly as the square of S and inversely as T. How does X change when S is doubled ? When both S and T are doubled ? I appreciate your help with this problem. Stephen La Rocque lui répond.
	Variation		2007-10-29
		deeqa pose la question : 1. A car traveled 175mi at a certain speed. If the speed had been 20mph faster, the trip could have been made in 1hr less time. Find the speed 2. The average weekly allowance A of children varies directly as their grade level, G. If the average allowance of an 8th-grade student is $8.56 per week, what is the average weekly allowance of a 5th-grade The time T required to do a job varies inversely as the number of people P working. It takes 2hr for 4 working. It takes 2 hrs for 4 volunteers to distribute flyers to a neighborhood. How long would it take 12 volunteers to complete the job? Penny Nom lui répond.
	Direct variation		2007-10-07
		Kimberly pose la question : If y is directly proportional to the square of x, and x=2 when y=12, then what is the value of y when x=3? Penny Nom lui répond.
	Direct variation		2007-05-07
		Jennifer pose la question : assume that y varies directly as x. find y when x = 54 if y =1/4 when x=3/2 Stephen La Rocque lui répond.
	Direct and inverse Variation		2007-04-03
		liz pose la question : how do you tell if an equation varies Directly or Inversely? ex. x= 2y or xy+12=3 i know that if you have three numbers (x. y, z) that it varies jointly but how do you tell if it is Inverse or Direct? Thanks for the Help! -liz Stephen La Rocque lui répond.
	What is the intensity 5m below the surface?		2007-03-31
		david pose la question : I have this question which I am supposed to set it up and solve as a differential equation. I know how to solve the diffrential equation but I am having hard time understanding this question. Here is the question: The intensity of light in the ocean decreases the deeper you dive. In fact, the rate at which the intensity decreases is proportional to the current intensity. Setup the corresponding differential equation and solve for I(Y), the intensity I as a function of current intensity Y. If the light intensity 2m below the surface is 25% of the intensity at the surface, what is the intensity 5m below the surface. Can you please explain to me what does it mean by current intensity and how do I set this equation up. Thanks for the help. Penny Nom lui répond.
	Direct and inverse variation		2007-03-03
		Rene pose la question : Hi I'm Rene, I'm stuck with some problems in direct and inverse variation. I know how to solve direct and inverse problems when only one variation is in a question at a time. EX: p varies inversely as the square root of q, and when p=12, q=36 find p when q=16 12*6 =p*4 72=4p 18=p But how would you solve a problem like..... If s varies directly as r and inversely as t, and s=10 when r=5 and t=3, for what value of t will s=3 when r=4 ? Penny Nom lui répond.
	What is the diameter of the planet?		2006-12-07
		Niall pose la question : In April 2005, scientists claimed to have captured light from an extrasolar planet orbiting a brown dwarf in the constellation Hydra some 230 light-years from Earth. The scientists believe the planet is about five times the mass of Jupiter. Assume the planet has the same density as Jupiter. What is the diameter of the planet? Stephen La Rocque lui répond.
	Direct variation		2006-11-05
		Johann pose la question : The perimeter of regular octagon varies directly with the length of one side of the octagon Stephen La Rocque lui répond.
	Direct and Inverse variation		2006-10-27
		Vishalinee pose la question : i'm not sure how to use the words direct variation and inverse variation to describe thre relationship between: a. speed and distance b.speed and time c. distance and time. and then i need to create equations using the descriptions. i am really messed up with direct and inverse variation. Karen McIver lui répond.
	The coefficient of variation		2006-05-20
		Glenn pose la question : What is the correct formula for coefficient of variation for a binomial distribution? Penny Nom lui répond.
	Coefficient of variation		2005-10-19
		Jan pose la question : I am currently teaching the coefficient of variation and am wondering if there are some guidelines as to the interpretation of this statistic. I understand that it measures the variation in a variable relative to the mean - but what is the cut off for "too much" variation expressed in this way??? Andrei Volodin and Penny Nom lui répond.
	Direct and inverse variation		2004-10-05
		Abraham pose la question : Given that y varies inversely as x and x varies directly as z.If z is doubled then y is halved.Why is that true.Please explain.I'm having trouble understanding the different types of variation Penny Nom lui répond.
	d varies inversely with g		2004-09-07
		Ashlyn pose la question : d varies inversely with g when d=-8 and g=2 a. write d as a function of g using function notation. b. find d(10). Penny Nom 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.
	Ciefficient of variation		2001-09-23
		Carmen pose la question : I have a question from my OAC finite class. I've come across a problem with the coefficient of variation. I have taught my students that there are no units for coefficient of variation and it can be expressed as a percent. So, for example, a set of data with mean of 5 and standard deviation of 100 would have a CV of 5%. But what happens in this situation: the mean is 4meters and the standard deviation is 0.7mm. Is the CV 1.75% or 0.00175% or 0.0175%? I've had some students change leave the units as is, change them both to mm or change them both to meters...so which is it and why? Penny Nom lui répond.
	Direct and inverse variation		2000-12-12
		Ashley pose la question : I'm stuck on this unit of direct and inverse variation..please and my problems and show me how to do each PLEASE!!! Assume that y varies directly as x If y= -4 when x = 2, find y when x= -6 Assume that y varies inversely as x If y =-4 when x=2, find y when x =-6 Penny Nom lui répond.

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