Question

The average life expectancy for a

citizen in the United States is about 73
years or 2,300,000,000 seconds.
What is the average life expectancy in
seconds in scientific notation?
[?] x 10 seconds

Answer 1

The average life expectancy in the United States in seconds, which is 2,300,000,000 seconds, is written as 2.3 × 10⁹ in scientific notation.

Step-by-step explanation:

The student was asked to express the average life expectancy in the United States, which is about 73 years or 2,300,000,000 seconds, in scientific notation. To convert seconds into scientific notation, you find the power of 10 that will make the number between 1 and 10 when multiplied by that power of 10. In this case, 2,300,000,000 seconds is 2.3 × 10 seconds in scientific notation because 2.3 multiplied by 10⁹ to the power of 9 equals 2,300,000,000.

Answer 2

2.3 x 10^9

Step-by-step explanation:

To calculate the average life expectancy in seconds in scientific notation, we need to convert the given value of 2,300,000,000 seconds into scientific notation. Scientific notation is a way to express numbers as a product of a coefficient and a power of 10.

To convert 2,300,000,000 seconds into scientific notation, we need to move the decimal point to the right until there is only one non-zero digit to the left of the decimal point. In this case, we can move the decimal point 9 places to the right, resulting in 2.3 x 10^9 seconds.

Therefore, the average life expectancy in seconds in scientific notation is 2.3 x 10^9 seconds.