Mathematics, 13.02.2021 04:10 ngj312

The temperature of a certain chemical substance varies sinusoidally with time. The highest temperature it reaches is 120° and the lowest temperature it reaches is 40° After 5 minutes, the high temperature was recorded and it takes 16 minutes to get back up to the
high temperature again. When will the temperature be 80° for the first time from t=0 minutes?
a 5 minutes
Ob. 1 minute
c. 13 minutes
d. 21 minutes

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