Final answer:
The population after 4 generations can be calculated by multiplying the initial population with the growth factor raised to the number of generations. In this case, the population after 4 generations is approximately 5062.5.
Step-by-step explanation:
The population of the bacteria colony can be modeled using a geometric progression. If the initial population is 1000 and the growth factor is 1.5, the population after 4 generations can be calculated as:
Population after 4 generations = Initial population * (Growth factor)^(Number of generations)
Substituting the values, we get:
Population after 4 generations = 1000 * (1.5)^4 = 1000 * 5.0625 = 5062.5
Therefore, the population after 4 generations is approximately 5062.5.