$\"\"$

The weekly cost C of producing x units in manufacturing process is $\"\"$ .

The number of the units x produced in t hours $\"\"$ .

The composition of C with x is $\"\"$ .

$\"\"$ (Definition of $\"\"$ )

$\"\"$ (Simplify)

The composite function $\"\"$ represents the amount of weekly cost as a function of the number of units produced in the amount of time in manufacturing process.

$\"\"$

The value of $\"\"$ .

The composite function $\"\"$ represents the amount of weekly cost as a function of the number of units produced in the amount of time in manufacturing process.