hiroto's texting plan costs $20 per month, plus $0.05 per text
message that is sent or received. emilia's plan costs $10
per month and $0.25 per text. using the graph below, which
statement is true?

Both plans cost the same when 50 texts are sent

Step-by-step explanation:

I just did 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.