Question

in the units used in the u.s., the speed of light is roughly 670 million mi/hr. using the information in the problem statement, find approximately how many miles there are in a light - year.
miles in a light - year = mi

Explanation:

Step1: Know the number of hours in a year

There are 24 hours in a day and 365 days in a non - leap year. So the number of hours in a year $h=24\times365 = 8760$ hours.

Step2: Calculate the distance in a light - year

The speed of light $v = 670000000$ mi/hr. Using the formula $d=v\times t$, where $t$ is time and $v$ is speed. Substituting $v = 670000000$ mi/hr and $t = 8760$ hr, we get $d=670000000\times8760$.
$d = 670000000\times8760=5869200000000$ mi.

Answer:

$5869200000000$