posted by lisa on .
A certain spaceship has a speed of 18200 mi/hr. What is its speed in light-years/century? A light-year is the distance that light travels in one year with a speed of 186,000 mi/s.
Divide 18,200 mi/hr by the number of miles in a lightyear. That will give you light years/hr. Then multiply the result by the number of hours in a century,