The temperature, H, in °F, of a cup of coffee t hours after it is set out to cool is given by the equation: °(²) ²³ (a) What is the coffee's temperature initially (that is, at time t = 0)? Initially, the coffee's temperature is i (b) What is the coffee's temperature after 1 hour? Enter the exact answer. H = 70+ 120 After 1 hour the coffee's temperature is i (c) How long does it take the coffee to cool down to 90°F? Round your answers to three decimal places. The coffee temperature reaches 90°F after i °F. °F. hours.

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