Find the LCM of the numbers using prime factorization.

18. 30, 42

Step-by-step explanation:

Factorización en factores primos :  

18/ 2

9/ 3

3/ 3

1

30/2

15/3

5/5

1

42/2

21/3

7/7

1

Y lo otro si me explicas como es t puedo ayudar  

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.