Which survey is biased?

a. going to the mall and asking people what their favorite color is.

b. going to the mall and asking people what their favorite place to shop is.

c. going to the mall and asking people what television channel they watch most.

d. going to the mall and asking people what radio station they listen to most often.

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.