The Number of Cars Running in the Business District of a Town

Multiple Choice

The number of cars running in the business district of a town at time t is given by f (t) . Carbon monoxide pollution coming from these cars is given by g(x) parts per million, where x is the number of cars being operated in the district.What does the function represent?

A) Carbon monoxide emission of the cars in the business district.
B) Total number of cars emitting Carbon Monoxide in the business district town at given time t.
C) Total number of cars in the business district town at given time t.
D) Total number of Carbon Monoxide emitted in the business district town by the cars.
E) Total Carbon monoxide emission of the cars in the business district town at given time t.