What is significant measurement?

What causes my left eye to not be able to focus and its rolling round and round? How heavy is kevlar per 1 meter square? How many minutes of daylight do you gain per day? What is 28 and 21 fully reduced? What are all the factors for the number seventy-eight? How many days to sail 1500 nm at 5 knots? What is the answer if you increase 23 a hundred times? What quadrilateral shape has opposite angles squal but no line of symmetry? What value of x in degrees would make segments bc and CD congruent? Does a pentagonal pyramid have 10 edges? What is the equivalent wavelength of 1000 Hz? What is smaller 0.25mg or 0.5? What is a former measure of length for cloth equal to 5.2 cm? Is 1.75 less than 1? What is a synonym and antonym for fact? What is the difference between a hacker and attacker? How useful are sets in your daily life? Where multiples and sub multiples of units are used? What is the average of 89 and 100? What is 620 divided by 58 with a remainder?