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	The integral of sqrt(x) * ln(x)		2009-10-12
		From Oana: Hi! Can you tell me please how much is : ∫ (√x * ln x) ? Answered by Penny Nom.
	Fractional part		2009-04-01
		From Galina: What fractional part of eight is eight hundredths Answered by Stephen La Rocque.
	Partial derivatives		2009-01-17
		From Meghan: I have a question I've been working at for a while with maxima/minima of partial derivatives. "Postal rules require that the length + girth of a package (dimensions x, y, l) cannot exceed 84 inches in order to be mailed. Find the dimensions of the rectangular package of greatest volume that can be mailed. (84 = length + girth = l + 2x + 2y)" Answered by Harley Weston.
	Partial variation		2008-11-03
		From Diamond: what are the 2 parts of partial variation? Answered by Penny Nom.
	Integration		2008-10-17
		From hazela: integration of x sinx cosnx Answered by Harley Weston.
	Integration by parts		2008-01-30
		From seth: hi i really dont understand integr ation by parts. for example, the integral(t^2sintdt. i have u=t^2 and v'=sint also u'=t^/3 v=-cost for the formula i have uv-integralvu' dx this is all well and good but i cant get it right. Answered by Harley Weston.
	A large concrete shape		2008-01-16
		From Keith: what is the cubic yards of an area that is not a perfect 1/4 circle? The dimensions are 100ft. x 60ft. x 125ft. curcumferal arch x 3ft. depth? Answered by Stephen La Rocque.
	Partial fractions		2008-01-06
		From taiwo: i copied the question below from john bird's higher engineering mathematics fourth edition (pg 19) after solving all the partial fraction questions from the book except this: x^3 + 4^2 + 20x - 7 over (x-1)^2 (x^+8). i will appreciate it if you help me out so i can know whether their answer is correct. thanks alot Answered by Harley Weston.
	Partitioning a clock face		2007-12-19
		From Kim: Using a clock with a regular circular faced dial, draw two straight lines such that the sum of the numbers in each of the three areas is equal. Answered by The team at Math Central.
	Dividing a circle		2007-11-23
		From matt: hi. can you please send me a diagram of how to draw 3 lines in a circle to get 8 sections. Answered by Stephen La Rocque.
	Motion along a line		2007-10-02
		From Claudette: If the position function of a particle is x(t) = sin^2(2t), find the distance that the particle travels from t = 0 to t = 2 Answered by Harley Weston.
	Integration		2007-02-02
		From Jenna: How do I integrate ( ln(x) ) / ( x^2 ) ? Answered by Penny Nom and Claude Tardif.
	Can one divide a circle into 4.5 parts		2006-03-30
		From Chris: If it is possible, can one divide a circle into say, 4.5 parts (with 4 equal parts and a half part)? Or for that matter, for any integer, n, into n/2 parts as above?] Answered by Walter Whiteley.
	A partial derivative		2004-03-19
		From Penny Nom: Is it possible to differentiate the following equation, if so could you please explain. S=SQRT(T-(5/X^2)) I would like the derivative of S with respect to X. Answered by Harley Weston.
	Integrating e^x sin(x)		2003-05-03
		From Lech: I am having trouble integrating the following expression by parts: ex sin(x) I used the integrator at http://www.integrals.com/ to find the solution, ? 1/2 ex cos(x) + 1/2 ex sin(x). This is easy to confirm by differentiation, however I am confounded as how to arrive at the answer. Answered by Penny Nom and Claude Tardif.
	Two problems		2002-10-14
		From Eva: a) How many different equivalence relations can be defined on the set X={a,b,c,d}? b)Show that 6 divides the product of any 3 consecutive integers. I know it is true that 6 divides the product of any 3 consecutive integers. However, i have problem showing the proof. Answered by Leeanne Boehm and Penny Nom.
	Dividing a circle		2001-10-17
		From Ahmeen: I am having a hard time figuring out how a circle can be divided into 11 equal parts with only 4 cut allowed? My teacher gave this to us and I still can't cut my pie into eleven equal parts with only four cuts. Answered by Walter Whiteley.
	Integration by parts		2001-04-09
		From A student: how do you integrate x tan-1x dx, i know it can be done by integration by parts maybe, but i'm not sure.... Answered by Claude Tardif and Harley Weston.
	Two integrals		2001-04-03
		From Jim: I'm having trouble with these integrals. Can you help me out? 1)the integral of: x5 arctan x dx 2)the integral of: 2x5 + 9x4 + 19x3 + 13x2 - 5x - 25 ----------------------------------------------- dx x4 + 4x3 + 5x2 Answered by Claude Tardif.
	Part of a part		2001-02-11
		From Katie: Hello! I was looking at your Fraction questions and since i am pursuing to be an elementry school teacher i feel i don't understand one of your responses. How would you explain this to an elem, midd, and high school student. Even me myself-in college really does not understand. The question was: When you multiply two positive fractions less than 1, how does the answer compare to the size of the fraction? Why? Answered by Penny Nom.
	Congruent parts of congruent figures		2000-03-10
		From Erica: Yesterday, I recieved a test problem asking to prove two line segments equal. Here is the problem as I was given it: Given: paralleogram ABCD AE is perpendicular to DB CF is perpendicular to DB Prove: AE is equal to CF I answered the problem as follows: . . . Answered by Walter Whiteley.
	Party favors		2000-02-22
		From Krystina Fernandez: Luanne was making party favors for her little sister's birthday party. Each party favor was in the shape of a cube. Luanne had pink and purple paint to paint the cubes and she could paint each face only solid pink or solid purple (no dots,stripes,ect.).For example, one cube may be all purple, another may have two purple faces and four pink faces. Her little sister wanted to have a different cube for each guest.(A cube is not considered different if it can be turned so that all it's sides match the corresponding sides of another cube.)How many different cubes was it possible for Luanne to make? Answered by Claude Tardif.
	Calculus problems		1998-07-13
		From Lorraine: I'm stuck again. Can you help? This involves integration using the method of partial fractions the integral of: 7x(to the 5th) - 2x(cubed) + 3 dx -------------------------------------- x(to the fourth) - 81 Do I have to do long division to reduce the numerator to the fourth power? the integral of: 4- 16x +21x(squared) + 6x(cubed) - 3x(fourth) dx ---------------------------------------------------- x(cubed)(x - 2)(squared) Lorraine Answered by Harley Weston.
	Les dérivées partielles		2012-05-16
		From Haddouche: Bonjour, Je vous demande de bien vouloir m'éclaircir comment on calcule les dérivées partielles généralement étudiées dans les modèles de la concurrence fiscale à titre d'exemple celui de Wildasin ""NASH EQUILIBRIA IN MODELS OF TAX COMPETITION "", dont j'ai essayé toutes les méthodes et aucune d'elle n'est arrivée à trouver le résultat des dérivées de ce dérnier papier, à cet effet, je vous serais reconnaissant de m'éclaicir la méthode afin de résoudre ce problème qui pour moi un vrai mistère à percer. Je vous remercie infiniment à l'avance. Et comptant sur votre compréhension, mes salutations les meilleures. HA Answered by Claude Tardif.
	le prix de départ		2006-09-10
		From un élève: Une jupe coûte 36 euros après une démarque de 20% quel est le prix de départ moi j'ai trouvé 45 euros mais je n'ai pas la formule de calcul exacte Answered by Claude Tardif.
	Partages inégaux		2005-09-29
		From Un eleve: Alex et julie ont ensemble 4728 .- euro Si Alex donne 538.- euro à Julie, ce dernier aurait alors le triple de Julie. Quelle est la somme possédée de chacun? Answered by Claude Tardif.
	Point de partage		2000-02-21
		From Sebastian Murciano: J'aurais besoin de savoir où je peux trouver de l'informations, ou est-ce que vous pouvez me donner de l'information sur : Point de partage d'un segment étudié en Secondaire 4. Answered by Claude Tardif.
	Derivées partielle		1999-10-19
		From Arnaud Flandin: Quel est la definition des derivées partielle Answered by Claude Tardif.

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