The Cost of Manufacturing Clocks Is Given By $c=9(n+49)^{1 / 2}$

Multiple Choice

The cost of manufacturing clocks is given by $c=9(n+49) ^{1 / 2}$ , where $c$ is the cost in dollars and $n$ is the number produced. What is the cost when no clocks are produced?

A) $\$ 9$
B) $\$ 21$
C) $\$ 63$
D) $\$ 441$