Suppose a boiling cup of coffee at 100^oC is allowed to sit in a room of temper…

Suppose a boiling cup of coffee at 100oC100^oC is allowed to sit in a room of temperature 25oC25^oC. You notice that a minute later, the coffee is 70oC 70^oC. After letting it sit out for 5 minutes from when it was boiling hot, you decide to put in cream, and the temperature decreases by a half. What is the temperature of the coffee now?
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