Why you use the number 1000000000?

In a parallelogram the diagonals are perpendicular bisectors of each other What kind of parallelogram must the figure be? How do you write 1.6 billion in digits? Which is larger 5 k or 5 m? Can a baby learn math in one week? What is 1111111111111111111111111111111 mutiplied by123456789000041233322341234556778890122? What is the perpendicular distance from the base of a triangle to the opposite vertex? How do you find a skrew line? Does a quadrilateral sides equal 45 degrees? What happens when you heat agar jelly at 120c for 30 minutes? How can you figure out pi? What fraction represents the whole number 16? How do you write 40023023 in word form? How using fraction strips with like denominators make it possible to add fraction with unlike denominators? Do you estimate before the problem or after? What is the algebraic expression for p less than 4? How is NPV method different from IRR method? Factor x2 plus 3x-40? How many days are are 55 hours? What is the algebraic expression for the product of two and m plus 4? How wide is a 50 foot circle?