\"\"

\

The degree days \"\". where h = high temperature and l = low temperature.

\

\"\"      (Substitute \"\" and \"\")

\

\"\"            (Add: \"\")

\

\"\"                 (Divide: \"\")

\

\"\"                      (Subtract: \"\")

\

\"\"                           (Apply modulus property: \"\")\"\"

\

The degree days are 22.