Computer Use The following graph shows the actual percentage of U.S. house...

Computer Use The following graph shows the actual percentage of U.S. households with a computer as a function of household income (the data points) and a logistic model of these data (the curve).

The logistic model is

where x is the household income in thousands of dollars.

a. According to the model, what percentage of extremely wealthy households had computers?

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 households of what income had computers in 2000? (Round the answer to the nearest $1,000).