Question: A computer analysis of the luminous efficiency E (in lumens/W) of a tungsten lamp as a function of its input power P (in W) is

A computer analysis of the luminous efficiency E (in lumens/W) of a tungsten lamp as a function of its input power P (in W) is given by E = 22.0(1 − 0.65e^−0.008P). Sketch the graph of E as a function of P for 0 ≤ P ≤ 1000 W.

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