Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together?

2.4 hours

2.5 hours

3.0 hours

4.0 hours

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

What is the sum of these mixed numbers 4 2/3+ 3 1/9

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?