Question

Sara has lived 18.0 years. How many seconds has she lived? Express the answer in scientific notation. Use 365.24 days per year for your calculations.

Answer 1

Answer:

She has lived $5.68021248\times 10^8\ \text{seconds}$.

Step-by-step explanation:

Given : Sara has lived 18.0 years.

To find : How many seconds has she lived?

Solution :

Using conversions,

1 year = 365.24 days

1 day = 24 hours

1 hour = 60 minutes

1 minute = 60 seconds

Converting 18 years into seconds,

$18 \text{years} = 18\times 365.24\times 24\times 60\times 60\ \text{seconds}$

$18 \text{years} =568021248\ \text{seconds}$

In scientific notation,

$18 \text{years} =5.68021248\times 10^8\ \text{seconds}$

Therefore, she has lived $5.68021248\times 10^8\ \text{seconds}$.