What does 6.28 equals on a ruler?

The scale on a map states that 1 centimeter corresponds to 20 kilometers. On the map two cities are 0.3 cm apart. Find the actual distance.? What is they conversion of 1189mm x 841mm to inches? What is 7.66 rounded to the nearest tenth? X times X plus 15? Which square number below 100 are also even numbers? How many days until 26 October 2011? What is Mach 0.85 at 36000 feet? What sitrep status represents 60 to 79 percent or less fit for duty? What is 900 times 900? Why empty set is set? Is yawning a positive or negative behavior? What is host of 172.16.1.1? How many people are up right now? What is 1lakh in numerical? What numbers do you add together to get the nucleon number of an ion? How many centigrams are there in 420 hectograms? What is 7 feet 4 inches minus 2 feet 7 inches? What number has more factors 36 or 48? What is 8x32 equal? What is 112 over 1000 turned into a decimal form?