Four couples go to the school's drama production and sit together in a row of eight seats. in how many ways can these people arrange themselves if each couple sits together?

 The required number of ways is 384.

Step-by-step explanation:  Given that four couples go to the school's drama production and sit together in a row of eight seats.

We are to find the number of ways in which these people arrange themselves if each couple sits together.

If each of the four couples sit together, then each couple can sit in 2! ways.

Also, all the four couples can arrange themselves in 4! ways.

Therefore, the number of ways  in which these people arrange themselves if each couple sits together is

Thus, the required number of ways is 384.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.