Paige ran one lab in 42.3 seconds, while diane's time for one lab was 42 1/3 seconds. which runner had the faster time? explain your reasoning.

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

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

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?