a) An environmental study in a community shows that the pollution level of a certain pollutant in the air increases by [math] parts per million for every [math] people added to the population
b)Census data for the community shows that the population of the community is increasing by [math] people per month.
c) Therefore this pollutant is increasing at a rate of [math] parts per million per month.
If pollutant level is measured by the variable L, the population is measured by the variable P, and time by t, and the standard units are units and units of people are "h" (humans), then rewrite each of these sentences in Leibniz derivative notation:
a) =
b) =
c) =

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