If 78 sit-ups is done in 2 minutes how many can be done in 5 minutes

195 sit-ups

Step-by-step explanation:

If 78 are done in 2 minutes, then

78/2 = 39   sit-ups are done per minute, so

39(5) = 195 sit-ups are done in 5 minutes

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.