What does mm mean behind a number?

How do you write 1836 in roman numerals? What is the density of a rock that has a mass of 21 grams and a volume of 3 cm? What is a better word for so? What is a matching mixed number for 5.3? What is the diagonal length of a rectangle with an area of 532.2672 square cm and a perimeter of 932.4 mm? What are decimals in ten thousandths place? Is cramped an adjective? Why is the quadrilateral not a square? How do you count syllables? What is 35 in roman numeral? How many gallons of water are in a 16 by 3 and a half foot pool? L 9 over 1000 in decimal form? Is Ada a boy name or girl name? List smallest to largest in order sucrose glucose and starch? How do you write the expanded form of 2430090? What is 3000mm equal m? What is CMXLIX in standard form? Which 2 order pairs are solutions of y x 5? How do you write 5 hundreds 6 ten thousands and 2 ones? Is a decimeter the same as a meter?