John-set a goal of swimming 20 laps in the pool every week during the summer. On Monday and Wednesday, he swam 5 laps each day. On Tuesday
and Thursday, he swam 2 laps each day. How many laps does he need to
swim on Friday to complete his laps for the week?

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.