What did Pythagoras make and do?

What would be more reasonable estimate for the expression in exercise 20? What are all the numbers that can be rounded to 540 to the nearest 10? What is 10 syllables per line with every secound syllable stressed? How do you change a percent that has a whole number into a fraction example 17 and one half to a fraction? What is620 round to nearset hundred? How is fifteen thousandths written as a number? What is the world's population broken down by country gender and age group? What is 1 and 1 sixth as a decimal? How many hour is 620 to 7pm? What is nought point one as a fraction? What does it mean for two points to be coplanar? How do you write 3 times a number? How do you write four million thirty in number? What numbers make the product 24? How many syllables does the word sanctuary have? What is the LCM of 8 and 9 using prime factorization? What are 1-10 sided shapes called? What is 0.8 of 180? What is 1.608 as a fraction? How do you write five and twenty eight thousandths?