The Cost of Manufacturing Clocks Is Given By $C ( x ) = 72 + 62 x - x ^ { 2 }$

question 57

Multiple Choice

The cost of manufacturing clocks is given by $C ( x ) = 72 + 62 x - x ^ { 2 }$ . Also, it is known that in thours the number of clocks that can be produced is given by x=9t , where $1 \leq t \leq 12$ Express C as a function of t .

• A) C(t)=72+62t-9
• B) C(t)=72+558t-81t²
• C) C(t)=72+62t+t²
• D) C(t)=72+558t-81t

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