..1) The speed of light is 3 X 10^8 m/s. Express this speed in miles/hour . ( 1 mile = 1609 m)
3X10^8X3600/1609 = 67122 ( why this is wrong answer no as my book )
Itry by calculator I got 67122 Mr F says: Read the calculator display properly. The answer has more digits. The answer is 67122XXXX (the X's are for you to fill in).