If m(x) = x2 + 3 and n(x) = 5x + 9, which expression is equivalent to (mn)(x)?

this stuff sucks i had to do this last week i just guessed it i geussed D and got it right

Step-by-step explanation:

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.