Recent content by Hannelore

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    Calc/Trig Hybrid Homework: Find P's Height & ds/dt

    Oh, you're right about cos(pi)=(-1)
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    Calc/Trig Hybrid Homework: Find P's Height & ds/dt

    Homework Statement A mass is suspended from the ceiling on a spring. It is pulled down to point P and then released. It oscillates up and down. Its distance, s cm, from the ceiling, is modeled by the function s=48 + 10cos(\Pit) where t is the time in seconds from release. (a)What is...
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    Gradient of the tangent to the curve question

    Homework Statement The point P (1/2, 0) lies on the graph of the curve of y=sin(2x-1) Find the gradient of the tangent to the curve of P Homework Equations ...I don't know The Attempt at a Solution I don't know where to start with this problem
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    Business Calculus 1: Average Cost Function & Min. Production

    I'm going to need more help with part b. I took the derivative of C(x) which is C'(x) = 5 + .004x + .00039x^2 I set it to zero and then I factored it but I got unreal numbers, negatives under the square root sign. So, I did it the way the book instructed and I set C'(x)=c(x) and this is...
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    Business Calculus 1: Average Cost Function & Min. Production

    1. C(x)=2200 + 5x + 0.002x^2 + 0.00013x^3 (a) Find the average cost function and sketch it (b.) At what production level is the average cost minimized? Homework Equations My book defines the average cost as c(x)=C(x)/x And the average cost is minimized when C'(x) = c(x) The Attempt at a...
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