In Alaska, the temperature at 11 a. m. was –10°F. Twelve hours later, it had decreased by 21.4°F. What was the temperature at 11 p. m.?

The temperature would be -31.4°F. As the temperature changes below zero, the new temperature is a negative number.

Step-by-step explanation:

-10-21.4=

-31.4°F

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.