What is the value of x?

enter your answer in the box.

x =

X= 68

Step-by-step explanation:

Also just took the test

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.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol