Solve the Problem $C ( x ) = \frac { 500 x } { 140 - x }$

Solve the problem.
-A power company burns coal to generate electricity. The cost C x (in $1000) to remove x% of the air pollutants is given by: $C ( x ) = \frac { 500 x } { 140 - x }$
a. Compute the cost to remove 25% of the air pollutants.
b. If the power company budgets $1.4 million for pollution control, what percentage of the air Pollutants can be removed?

A) a. $\frac { 2500000 } { 23 }$
b. $135.17 \%$

B) a. $\frac { 2500 } { 23 }$
b. $135.17 \%$

C) a. $\frac { 2500 } { 23 }$
b. $103.16 \%$

D) a. $\frac { 2500000 } { 23 }$
b. $103.16 \%$