In the above figure, the distance between points S and T represents

People are most likely to make their opinions on a potential piece of legislation known to their representatives when

A) the legislation matters greatly to them, whether or not it affects their private interests. B) the legislation will affect their private interests substantially. C) they believe their actions will make enough difference to justify the effort. D) they can do so at low cost to themselves.

A firm sells in a competitive market in which price is $10 . Its marginal cost is 2 + .5Q. Determine the profit-maximizing level of output