Final answer:
The number of degree days for a 30 day month with an average temperature of 45°F is calculated as 600, based on the standard heating base temperature of 65°F.
Step-by-step explanation:
The number of degree days for a certain month is calculated based on a base temperature taken as a point of reference for a 'normal' environment, typically 65°F for heating purposes. Given the average temperature for the month is 45°F, we can use the formula for Heating Degree Days (HDD):
HDD = (65°F - average daily temperature) * number of days in the period
First, we'll identify the difference between the base temperature and the average monthly temperature:
65°F - 45°F = 20°F
Now, we'll multiply this difference by the number of days in the month to get the total degree days:
20°F * 30 days = 600 degree days
So, the number of degree days for that 30 day month with an average temperature of 45°F is 600.