Question

In the graph below, the solid blue line represents the marginal cost of reducing particle emissions $($measured in pounds$)$ f

a firm. The dashed line represents a newly imposed pollution charge of $$320$ for every pound of pollution emitted.

Suppose the firm is currently emitting more than $50$ pounds of particle emissions and must decide how to respond to the

pollution charge. $($Assume that particle emissions can only be reduced in multiples of ten pounds.$)$

By how many pounds will the firm choose to reduce its total particle emissions?