Which is the best estimate for the liquid volume of a bottle of water? 500 milliliters, 5 milliliters, 500 liters or 5 liters

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]