Recent content by cidyah

  1. C

    Let R be the shaded region bounded by the graphs of y=sqrt of x and y=e^-3x and the

    a) Draw a graph of the functions. In the range 0 to 0.2387 , e^-3x > sqrt(x) and in the region 0.2387 to 1, sqrt(x) > e^(-3x) The two curves intersect at x=0.23873413 Area = ? [e^(-3x) - x^(1/2) ] dx , limits [0, 0.23873413] + ? [x^(1/2) - e^(-3x)] dx, limit [ 0.23873413,1] = -(1/3)...
  2. C

    Find the Critical Numbers and use the closed interval test to determine any...

    f(x) = cos(x) f'(x)=-sin(x) = 0 sin(x) = 0 x=0 + 2nPI, where n is any integer x= 2PI when n=1 x=PI+2nPI, where n is any integer Let n=1 x=PI+2PI= 3PI x=PI,2PI,3PI are solutions Alternate method of finding extrema: If f(x) is continuous in a closed interval I, then the absolute extrema of f(x)...
  3. C

    Help to find increase in total profit? (Business Calculus)?

    When x increases by 1 unit, profit increases by 820-8x = 812 units When x increases by 50 units (150 to 200) , profit increases by 820-8(50) = 420 units.
  4. C

    Help to find increase in total profit? (Business Calculus)?

    When x increases by 1 unit, profit increases by 820-8x = 812 units When x increases by 50 units (150 to 200) , profit increases by 820-8(50) = 420 units.
  5. C

    Astronomy Question: About gravity and Planets?

    OK, it is possible to create zero gravity on Earth. My question is, is it also possible to create gravity comparable to that of Jupiter on the Earth? It would mean that your weight may be ten times of what it is and you may find it difficult to walk and lift light objects. Has it ever been done...
  6. C

    A 26in bicycle wheel rolls for 4 miles. How many revolutions will the wheel

    4 miles = 253 440 inches Divide by 26 =9747.68 =9748 revolutions
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