Question

Which of the following correctly expresses the value of 4.9×10⁴ in decimal notation AND in the SI unit for time?

A. 49,000 seconds
B. 49,000 hours
C. 0.00049 seconds
D. 0.00049 hours

Answer 1

The value of 4.9×10⁴ in decimal notation is 49,000 seconds.

Step-by-step explanation:

SI units, or the International System of Units (Système International d'Unités in French), is the modern form of the metric system and is widely used in scientific and everyday applications worldwide. The SI system provides a standardized set of units for measuring physical quantities.

The value of 4.9×10⁴ in decimal notation is 49,000. To express this value in the SI unit for time, we need to convert it to seconds. Since 1 hour is equal to 3600 seconds, and there are 24 hours in a day, we can convert 49,000 hours to seconds as follows:

49,000 hours × 3600 seconds/hour = 176,400,000 seconds

So, the correct answer is A. 49,000 seconds.