Answer :
In 2000, the total hours of TV watching (386 billion) and the population (265 million) were expressed in scientific notation. The average hours per person per day was approximately 0.004, or 14.57 minutes.
a. Writing each number in scientific notation:
Total hours of TV watching: 386 billion hours = 3.86 x 10^2 billion hours.
Population: 265 million people = 2.65 x 10^2 million people.
b. Finding the average number of hours of TV viewing per person older than age 2 for 2000:
Average hours per person = Total hours / Population
Average hours per person = 3.86 x 10^2 billion hours / 2.65 x 10^2 million people
To simplify, you can cancel out the units (billion hours and million people) to get the result in hours per person.
Average hours per person = 3.86 / 2.65 hours
Average hours per person ≈ 1.457 hours
c. On average, how many hours per day did each person older than age 2 watch television in 2000:
Assuming people watched TV evenly throughout the year, you can use the fact that there are approximately 365 days in a year:
Average hours per day = Average hours per person / Days in a year
Average hours per day = 1.457 hours / 365 days
Average hours per day ≈ 0.004 hours per day
So, on average, each person older than age 2 watched approximately 0.004 hours (or 14.57 minutes) of television per day in the year 2000.
