Internet Use The following graph shows the actual percentage of U.S. resid...

Internet Use The following graph shows the actual percentage of U.S. residents who used the Internet at home as a function of income (the data points) and a logistic model of these data (the curve).

The logistic model is given by

where x is an individual’s income in thousands of dollars.

a. According to the model, what percentage of extremely wealthy people used the Internet at home?

b. For low incomes, the logistic model is approximately exponential. Which exponential model best approximates P(x) for small x?

c. According to the model, 50% of individuals with what income used the Internet at home in 2000? (Round the answer to the nearest $1,000).