Final answer:
When no clocks are produced in the expression C = 9vn + 49, the cost C is $49. This is because the term 9vn becomes zero when n is set to zero, leaving only the constant term.
Step-by-step explanation:
In the expression C = 9vn + 49, where C is the total cost and n is the number produced, the cost when no clocks are produced can be found by setting n to zero. Since multiplying anything by zero gives zero, the term 9vn will be zero when n is zero. Thus, no matter what the value of v is, the cost C will just be equal to the constant term, which is 49.
Therefore, if no clocks are produced (n = 0), the total cost C will be $49. This constant could represent fixed costs that are incurred regardless of the number of clocks produced, like rent or insurance.