## Algebra 1: Common Core (15th Edition)

Answer Choice $C$
There are $365$ days in a year, $24$ hours in a day, and $60$ minutes in an hour. We can multiply $400 \times 20 \times 60\times 8$ to get an estimation. $400 \times 20 \times 60\times 8=3,840,000$ The closest answer to that is $\boxed C$.