An aircraft factory manufactures airplane engines. The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made. If X engines are made, then the unit cost is given by the function C(x)=0.2-36x+17,550. What is the minimum unit cost? Do not round your answer. Will report fake answers.
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Given : The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made. x = engines made, C(x)=0.2x²-36x+17,550
To find : minimum unit cost
Solution:
C(x) = 0.2x² - 36x + 17,550
dC/dx = 0.4x - 36
put dC/dx = 0
=> 0.4x - 36 = 0
=> 0.4x = 36
=> x = 90
d²C/dx² = 0.4 > 0
Hence at x = 90
Cost will be minimum
C(90) = 0.2(90)² - 36(90) + 17,550
= 1,620 - 3240 + 17,550
= 15930 $
minimum unit cost = 15930 $
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