Model the situation using a differential equation. State the units of each variable and the units of the derivative.
A wasp population has a 10 percent birth rate and a 9 percent death rate. Every year people swat an additional 300 wasps.
Let W be number of wasps and t be time in years. Then
If we look at the 10 percent birth rate and 9 percent death rate, we see that the wasp population should be increasing by 1 percent per year. Then people swat another 300 wasps per year, so we need to subtract another 300 from the rate.