he conversion factor relating miles to meters is 1mile=1610m1mile=1610m. The speed of light is 3.00*108 m/s3.00*108 m/s. How fast is this in miles per hour (miles/hmiles/h) ?

6.708 * 10⁸ miles/h

Explanation:

Given:

Speed of Light = 3.00 * 10⁸ m/s

1 mile = 1610 m

⇒1 m = 1/1610 mile

also 1 second = 1/3600 hrs

so 3.00 * 10⁸ m/s = (3.00 * 10⁸ * 3600) / 1610 m/h = 6.708 * 10⁸ miles/h

thus 3.00 * 10⁸ m/s = 6.708 * 10⁸ miles/h