Solve the Problem $\mathrm { f } ( \mathrm { x } )$

Multiple Choice

Solve the problem.
-Suppose the cost per ton, $\mathrm { f } ( \mathrm { x } )$ , to build an oil platform of $x$ thousand tons is approximated by $f ( x ) = \frac { 312,500 } { x + 625 }$ . What is the cost per ton for $x = 10$ ?

A) $\$ 50.00$
B) $\$ 30,625.00$
C) $\$ 31,250.00$
D) $\$ 492.13$