The average temperature of a particular town in Alberta can be represented by the function 6 T=15.8sin((-3))+5, where T is the average temperature in degrees Celsius and t is the time in months after January 1. The minimum number of months, to the nearest tenth of a month, it takes for the average temperature of the town to rise from 5°C to 15°C is a. 1.3 months b. 3.0 months c. 2.6 months d. 4.3 months

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