1. ## word problem question

the speed of light is 1.863 x 10^5 miles per second.

assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

i have no idea what to do. help

2. Originally Posted by math1645
the speed of light is 1.863 x 10^5 miles per second.

assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

i have no idea what to do. help
You are given the speed of light as $\displaystyle 1.863 x 10^5$ mi/s. There are 60 s/min, 60 min/hr, 24 hr/day, and 365.25 day/yr. Notice how if you multiply those "fractions" together everything cancels except mi/yr?