09/25/14

Find proportion given mean and standard diviation
If a student A scored 34 on a test of reading and the test had a mean of 51 and a standard deviation of 9, what proportion of test respondents scored below student A?
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04/06/14

Find the radius of convergence?
Find the radius of convergence of the power series ∑ (-1)^n*(4x+1)^n from n=0 to infinity.    Answer: 1/4   I did the ratio test and got limit as n approaches to infinity of absolute value of... more
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03/30/14

Find general solution of y'' + y = 3sin(2t) + tcos(2t)
Answer: c1cos(t) + c2sin(t) -1/3tcos(2t) -5/9sin(2t) Please show the work step by step.
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03/30/14

Find general solution of 2y" + 3y' + y = t^2 + 3sin(t)
Answer: c1e^-t + c2e^-t/2 + t^2 +6t + 14 -3/10sin(t) - 9/10cos(t) Please show the work step by step.
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03/30/14

Find general solution y" + 2y' = 3 + 4sin(2t)
Answer: c1 + c2e^-2t + 3/2t - 1/2sin(2t) - 1/2cos(2t)
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03/30/14

Statistics Math Help
Students in a college class were asked to time how long it takes them in minutes to get ready in the morning. Here were the responses: 14, 28, 5, 12, 56, 32, 2, 17Construct a 90% confidence... more
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08/08/13

Find the inverse Laplace transform?
Find the inverse Laplace transform of F(s)=(8s^2-4s+12)/(s(s^2+4)). Answer: f(t)=3-2 sin 2t+5 cos... more
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07/14/13

Suggest me a good textbook for partial differential equations?
What's the name of the textbook for partial differential equations that MIT uses? Name me the title of the book, the edition, author, etc.
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