The average monthly temperature, T(m), in degrees
Fahrenheit, over a 12 month period, can be
modeled by T(m) = -23 cos
(m) +56 where
m
is in months. What is the range of temperatures,
in degrees Fahrenheit, of this function?
A. [-23,23]
B. [33,79]
C. [-23,56]
D. [-73,33]