Question

A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles/second. (Round to one decimal place, and assume that there are 365 days in a year.)

Answer 1

Multiply that 1.86*10^5 miles/sec number by the number of seconds in a year.

The number of seconds (in a year) is
24 x 60 x 60

Answer 2

160.7