Erin earns $7.50 for each hour she works. Rita earns $9.00 for each hour she works.
The table shows the amounts that Erin and Rita earn for working 1 to 6 hours.

A table showing Erin and Rita's earnings. After one hour, Erin earns seven dollars and fifty cents and Rita earns nine dollars. After two hours, Erin earns fifteen dollars and Rita earns eighteen dollars. After three hours, Erin earns twenty-two dollars and fifty cents and Rita earns twenty-seven dollars. After four hours, Erin earns thirty dollars and Rita earns thirty-six dollars. After five hours, Erin earns thirty-seven dollars and fifty cents and Rita earns forty-five dollars. After six hours, Erin earns forty-five dollars and Rita earns fifty-four dollars.

How will their total earnings compare for a 40-hour workweek?

Afriend of mine is giving a dinner party. his current wine supply includes 10 bottles of zinfandel, 8 of merlot, and 11 of cabernet (he only drinks red wine), all from different wineries. (a) if he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this? ways (b) if 6 bottles of wine are to be randomly selected from the 29 for serving, how many ways are there to do this? ways (c) if 6 bottles are randomly selected, how many ways are there to obtain two bottles of each variety? ways (d) if 6 bottles are randomly selected, what is the probability that this results in two bottles of each variety being chosen? (round your answer to three decimal places.) (e) if 6 bottles are randomly selected, what is the probability that all of them are the same variety? (round your answer to three decimal places.)