Q1(i) If the demand curve for a particular commodity is p = −0.09x + 51 and thetotal cost function C(x) = 1.32x2 + 11.7x + 101.4,where x is the level of production. Find(a) The revenue R(x) and profit Π(x).(b) All values of x for which production of the commodity is profitable.(ii) The total cost of manufacturing x units during the daily production run at a factory, isC(x) = x2 + x + 900 dollars. Usually, x(t) = 25t units are manufactured during thefirst t hours of production.(a) Express the total manufacturing cost as a function of t.(b) How much will have been spent on production by the end of the third hour?(c) When will the total manufacturing cost reach $11,000?

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ISBN:9780470458365
Author:Erwin Kreyszig
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(i) If the demand curve for a particular commodity is p = −0.09x + 51 and the
total cost function C(x) = 1.32x
2 + 11.7x + 101.4,where x is the level of production. Find
(a) The revenue R(x) and profit Π(x).
(b) All values of x for which production of the commodity is profitable.
(ii) The total cost of manufacturing x units during the daily production run at a factory, is
C(x) = x
2 + x + 900 dollars. Usually, x(t) = 25t units are manufactured during the
first t hours of production.
(a) Express the total manufacturing cost as a function of t.
(b) How much will have been spent on production by the end of the third hour?
(c) When will the total manufacturing cost reach $11,000?

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