Question 440172
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Hi
T = 420 - 350 (3.2)^-.1m  |where m represents the number of minutes after the oven is turned on 
and T represents the temperature of the oven in degrees Fahrenheit.
T = 420 - 350 (3.2)^-.1m 
 (T-420)/-350 = 3.2^.1m
 log[(T-420)/-350]/log(3.2) = -.1m
 T = 320
 log[(-100)/-350]/log(3.2) = -.1m

 log .2857/log(3.2) = -.544/.5 = -.1m
                   -1.08 = -.1m
                    m = 10.8 min, time it takes to reach a temperature of 320F