The function t = 21.55 cosine (StartFraction pi Over 6 EndFraction (m minus 7) ) + 43.75 models the average high temperature in degrees Fahrenheit each month throughout the year in Anchorage, Alaska, where m = 1 for January and m = 12 for December. Approximately how many months is the average high temperature above freezing (32°F)?
7
8
10
11