How do you reduce 21?

What is163cm in feet x inches? Why is the molecular geometry of PH3 trigonal pyramidal? When calculating acceleration to find the change in velocity do you subtract the initial velocity from the final velocity? What is the height of a circular cylinder if the volume is 54 and the radius is 3? Which is accurate in adding vectors graphical or arithmetic? What is 150 to the power of 7? How do you calculate weight of duct of 4 meter length and 4250 diameter? What are Some of the factors used to approximate the value of loss for crashes are? What is the equation of a line that has a x intercept of -6 and a y intercept of -10? How many zeros at the product of in 1 to 100 answer should be 127? How do you write 1.29 billion? Is 28 inches greater or less than 2 feet? Average stenographic words per minute? Where can you find a schematic of a franchi 612 vs? What do these numbers have in common44 62 71 80 116 2222? How long is The NBA 2 point line? How many square feet of land is 5 cent in India? Can a semiregular tessellation be used with more than two shapes? How long is 595 seconds? How is the Bible used in courts?