The entire population of the United States (about 3.0 × 10⁸ people)each spend thirty seconds reading the latest astronomy news.In total,how many hours have people spent learning about the latest advance?
A) 2.5 million
B) 25 million
C) 250 million
D) 2.5 billion

Question

Quizplus · Accepted Answer

The total time spent is calculated by multiplying the number of people by the time each person spends reading. Since there are 3.0 × 10⁸ people and each spends 30 seconds (or 0.5 minutes), the total time in minutes is 3.0 × 10⁸ × 0.5 = 1.5 × 10⁸ minutes. To convert this into hours, divide by 60 (since there are 60 minutes in an hour), resulting in 2.5 × 10⁶ hours, or 2.5 million hours.

The Entire Population of the United States (About 3