http://mathcentral.uregina.ca/QandQ/ Math Central is a free online mathematics service for students and their teachers. Quandaries and Queries is the section of the site where students and others can pose their own mathematical problems and our math consultants provide assistance. 15 en Copyright 1995-2012, Math Central theCentralizer@mathcentral.uregina.ca webtech@mathcentral.uregina.ca Wed, 16 May 2012 12:43:44 CST Mathematics http://blogs.law.harvard.edu/tech/rss http://mathcentral.uregina.ca/lid/images/logo_for_rss.gif http://mathcentral.uregina.ca/QandQ/ 69 60 Enter key phrases or words to find Quandaries and Queries relating to those concepts. qck http://mathcentral.uregina.ca/QandQ/asdf http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/kodie1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/kodie1.html Wed, 16 May 2012 12:43:44 CST What is the easiest way to find slope? Mathematics Quandaries and Queries at Math Central http://centraledesmaths.uregina.ca/QQ/database/QQ.09.11/h/haddouche1.html http://centraledesmaths.uregina.ca/QQ/database/QQ.09.11/h/haddouche1.html Wed, 16 May 2012 09:21:40 CST 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 Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/tim2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/tim2.html Wed, 16 May 2012 05:42:15 CST For a circle of Diameter 12 Mtrs, I have a chord length of 2 Mtrs, How can i calculate the distance from the middle of the chord to the perimeter of the circle Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/fleur1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/fleur1.html Tue, 15 May 2012 18:29:20 CST I am helping my child make a cone lampshade, the measurements are as follows in "cm's" 21 cm = height 8 cm = top diametre 40 cm = bottom diametre Please could you give the pattern (cut out) dimensions for final cut. Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jordan2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jordan2.html Mon, 14 May 2012 19:24:30 CST How do I solve the equation: 3(x+4)(x-6) Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/mafiza1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/mafiza1.html Mon, 14 May 2012 15:37:21 CST A and B started a business by investing $6000 and $8000 respectively. At the end of the year, a profit of $2100 is made. How much amount will A get as his share of profit? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/peter1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/peter1.html Mon, 14 May 2012 07:48:32 CST If a golf drive travels 250 yards with a perfectly perpendicular hit, what is the length of the base, if a second golf drive is off line by one degree? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/hope2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/hope2.html Mon, 14 May 2012 06:25:35 CST cos (theta / 30 = 1 I am very confused as to how to solve it. Can you help? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/debbie1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/debbie1.html Mon, 14 May 2012 05:50:24 CST A basketball team scores 216 points in 8 quarters . Find the teams point per quarters rate Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/alysia1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/alysia1.html Sun, 13 May 2012 06:59:45 CST The scores on a test taken by 1000 students are normally distributed with a mean of 66 and standard of deviation of 12. If the college wishes only the top 8% of people to get an A, what would the cutoff score be for the A's? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/pragun1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/pragun1.html Sun, 13 May 2012 06:06:12 CST Three metallic cubes whose edges are in the ratio 3:4:5 are melt to form a single cube whose diagonal is 12*square root of 3. What are lengths of the edges(in cm) of the three cubes Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/desiree1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/desiree1.html Sat, 12 May 2012 18:40:35 CST 3x -5^2=8 Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jimmy2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jimmy2.html Sat, 12 May 2012 15:15:56 CST A bowl of water, being a hemisphere has a radius of 36cm. Water is filled in the bowl and has depth of 18 cm. Find the surface area of the water? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/steve3.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/steve3.html Sat, 12 May 2012 14:40:34 CST We have six golfers playing in two threesomes for six rounds of golf. Can you help solve this so that everyone plays with everyone else the same amount of times or close to it? Thanks! Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/nazrul3.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/nazrul3.html Thu, 10 May 2012 18:22:50 CST How can I draw an isosceles triangle whose each angle adjacent to the base is twice the vertex angle? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/liz2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/liz2.html Mon, 07 May 2012 13:53:30 CST a biathlete travels 20 miles in 2.25 hours. She cycles part of the way at 12 mph and runs the rest at 5 mph. How far did she run? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/abanoub1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/abanoub1.html Sun, 06 May 2012 14:34:46 CST the school fair books cost $4.89 each if Suzy brought $98.76 with her how many books could she buy? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/justin2.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/justin2.html Sat, 05 May 2012 06:34:41 CST Which expression can be used tofind the nth term in this sequence? 94,75,56,37,18,..... My choices are A. -19n=113        B. -21n+115 C. -19+75        D. 21n+73 Please explain how to get the correct answer. I think it is A. but I am not sure, Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/scott1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/scott1.html Thu, 03 May 2012 09:21:43 CST In order to make a 25% solution with 96% Sulfuric Acid, how much of the Sulfuric do I add to DI water to make up 2000ml?? Mathematics Quandaries and Queries at Math Central http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jimb1.html http://mathcentral.uregina.ca/QQ/database/QQ.09.11/h/jimb1.html Thu, 03 May 2012 06:57:15 CST I cannot seem to get this to work. Previous answers cover 2-balls, but we are 4-balls. What we really want is for each player to play with each other, at least once and no more than twice. Ideally, each would also play equally in the first and the second 4-ball of the day. Mathematics Quandaries and Queries at Math Central