Gretchen lives in florida, for the current temperature 69°f and rising at a rate of 2°f per hour. she's talking on the phone to her friend in indiana where the temperature is now 84°f and falling at a rate of 3°f per hour.
a.) if the temperature continue changing at the same rates, how many hours would gretchen and her friend have to talk before the temperature become equal?
b.) what will the temperature be?