From 1975 through 1989, the population, P (in 1000's) of California can be modeled by P = 23.5(t+42), where t=0 represents 1975. What year will the population be 1,175,000?

The year when the population will be 1,175.000 is 1983.

Explanation:

Let the population of Califonia be represented by , where is time, measured in years. If we know that , then the time associated with such population is:

Then, the year when the population will be 1,175.000 is 1983.