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A travel mug of 91∘C coffee is left on the roof of a parked car on a cold winter day. The temperature of the coffee after t minutes is given by H=91(2)−t/14. After how many minutes will the coffee be only
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A travel mug of 91∘C coffee is left on the roof of a parked car on a cold winter day. The temperature of the coffee after t minutes is given by H=91(2)−t/14. After how many minutes will the coffee be only lukewarm (30∘C)?

User Ety
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Answer: A

Step-by-step explanation:

User Alexandre Khoury
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