A company produces a certain good for which the (inverse) demand function is given by p = 15 - 2q, where p is the unit price (expressed in some monetary unit) and q is the quantity sold (expressed in some non-specified unit). The fixed costs amount to 6.5 monetary units and the variable costs amount to 1 monetary unit per non-specified unit of the good. We assume that all goods produced are sold. a. Find the function equation for the profit functionP in terms of the quantity q. b. Find the domain of the profit function P. c. Determine for which production levels q the company makes a profit.

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
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Chapter1: Making Economics Decisions
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I have gotten parts a and c but i can't seem to get the answer for part b as for part a i get P = -2q^2 + 14q - 6.5 and when i try find the domain for this i get [0.5,6.5] as i assume P must be >/= 0 but my answer sheet given alongside the Q says the answer to part b is [0,7.5] could you help explain why that is or if the previous answer is correct?

11. A company produces a certain good for which the (inverse) demand function is given by p = 15 - 2q,
where p is the unit price (expressed in some monetary unit) and q is the quantity sold (expressed in
some non-specified unit). The fixed costs amount to 6.5 monetary units and the variable costs amount
to 1 monetary unit per non-specified unit of the good. We assume that all goods produced are sold.
a. Find the function equation for the profit functionP in terms of the quantity q.
b. Find the domain of the profit function P.
c. Determine for which production levels q the company makes a profit.
Transcribed Image Text:11. A company produces a certain good for which the (inverse) demand function is given by p = 15 - 2q, where p is the unit price (expressed in some monetary unit) and q is the quantity sold (expressed in some non-specified unit). The fixed costs amount to 6.5 monetary units and the variable costs amount to 1 monetary unit per non-specified unit of the good. We assume that all goods produced are sold. a. Find the function equation for the profit functionP in terms of the quantity q. b. Find the domain of the profit function P. c. Determine for which production levels q the company makes a profit.
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