The exponential function describing the quantity of caffeine remaining in a person's body, Q ,t hours after that person drinks a Short cup of coffee from Starbucks is Q(t) = 180 · (0.8)* According to this equation, what is the hourly decay factor of caffeine? Use this function (and logarithms) to compute how long it takes (in hours) until the person only has 150 mg of caffeine left in their body. Enter an exact logarithmic expression (on the left) and a decimal rounded to the nearest thousandth (on the right).

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