In a recent year, 37% of all college students were enrolled part-time. If 6.7 million college students were enrolled part-time that year, what was the total number of college students? Round your answer to the nearest million

The question was asking for the number of customers to break even.

In an opinion poll, 715 or 63% of people interviewed were opposed to the issue asked.  How many people were interviewed?

Suppose that the results of a survey show that 28% of people consider summer as their favorite season. How many people should be surveyed in order to have a margin of error of 6%? Round up to the nearest whole number, if necessary. In order to have a margin of error of 6%,how many people should be surveyed.