Answer all of the

1) gretchen lives in florida, where the current temperature is 69°f and rising at the rate of 2°f per hour. she is talking on the phone to her friend in indiana where the weather temperature is now 84°f and falling at the rate of 3°f per hour.

a) if the temperatures continue changing at the same rate, how many hours would gretchen and her friend have to talk before the temperatures become equal?

b) what would the temperature be?