What are standered units?

Items that are a decimeter long? What is 1.06 rounded to? What problem did inventing the hairbrush solve? Which has more a hexagon or a pentagon? Which weighs more 1 pd of bricks 1 pd of feathers or 1 pd of cheese? How do you draw a complete angle? What are the two numbers that have the sum of 42 and the product of 432? How many months is 586 days? If regular price is 4.00 with a 25 percent discount how much would be sale price? How many significant figures in 0.999? How do you write 101 in words? What polygon is a quadrilateral is a parallelogram and the diagonals bisect each other? What is the median of 24 26 28 13 36 3 37 7 21 12 34 25? What is one tenth of 2? Who can perform derivative classification? Why can't 3782 be divided by 9? What does clear data mean? What is two numbers multiplied together give you 35? What is the density of a board whose dimensions are 5.54 centimeters x 10.6 centimeters x 199 centimeters and whose mass is 28.6? How do you solve 5 to the negative second power?