Archive for category Mathematics

How many grams of the original solution did we start with?


A 30% solution of barium chloride is mixed with 10 grams of water to form 20% solution. How many grams of the original solution did we start with?
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How much of each solution is needed to make 500 milliliters of a 6% solution?


A laboratory employee is mixing a 10% saline solution with 4% saline solution. How much of each solution is needed to make 500 milliliters of a 6% solution?

Any help would be appreciated!

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To test whether internet use increases depression score, we measure the depression sc?


To test whether internet use increases depression score, we measure the depression scores for a random sample of non-internet users, have them use the internet for a specified time, then measure their depression scores again.

(a) matched pairs t-test
(b) two-sample t-test
(c) ANOVA
(d) chi-squared test for independence
(e) inference for regression
which statistical test is the most appropriate?

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What is the best online calculus tutorial which is more advanced and comprehensive?


I am in college taking Calculus II and learning about Taylor series, convergence tests, remainder estimates, etc. etc. I am looking for an online site that can help me out, preferably with practice problems and solutions too. Comprehensiveness is a must, please don’t give me sites that are very simple and only list the theorems and that’s it. Thanks in advance.

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Any one know a good Web for Optimization problems(with solutions)?


i think the best web i have found is: http://tutorial.math.lamar.edu/Classes/CalcI/Optimization.aspx
but this is just the basics of optimiztions, any one know better sites that gives the word problems and solutions?
thanks alot for your answers(10 points for best web)

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Is there anywhere on the web where I can enter in Finite Math problems and get guided solutions?


I am taking an online math class and having trouble. I need a website that will let me enter in the exact problem I’m working on and show me the steps to solving the problem. Does anyone know of a website that does this?

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where is the best place to get online worksheets with + – / * of fractions with solutions?


I am trying to prepare for the college ASSET test and I am having trouble finding resources to help me study for this test. I would really like to score high on this test so I won;t need remedial classes but I don’t know where I should look for the math help or other help I need for that matter. If anyone could help me it would be great! Thanks so much and may God Bless you!

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Does anyone know where I can find the solutions to my math league contests?


Volume 1 by Mathematics Leagues Inc.
Can you check your solutions online without actually owning the book?

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What is the best online calculus tutorial which is more advanced and comprehensive?


I am in college taking Calculus II and learning about Taylor series, convergence tests, remainder estimates, etc. etc. I am looking for an online site that can help me out, preferably with practice problems and solutions too. Comprehensiveness is a must, please don’t give me sites that are very simple and only list the theorems and that’s it. Thanks in advance.

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Where can I find the torrent of Calculus: Concepts and Contexts 3rd edition by James Stewart solutions manual?


Where can I find the torrent of Calculus: Concepts and Contexts 3rd edition by James Stewart solutions manual online?

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