You can put this solution on YOUR website! Two choices:
METHOD 1: Convert rate to m/week **= (Speed of light - Rate in meters per week)
So in 6 weeks
6 weeks*()= ANSWER
METHOD 2: Convert 6 weeks to seconds and multiply
6 weeks*(168 hrs/week)*(3600sec/hr)= (Seconds in 6 weeks)
And multiply number of seconds by rate per second:
3*(10^8)m/sec*3.6288*(10^6)secs=