According to the Encyclopedia Britannica, "The snowy tree cricket (Oecanthus fultoni) is popularly known as the thermometer cricket because the approximate temperature (Fahrenheit) can be estimated by counting the number of chirps in 15 seconds and adding 40." Express this statement as a formula giving the temperature T as a function of the number N of chirps per 15 seconds for the snowy tree cricket.

Algebraically, transform the expression from part (a) into an equivalent one giving the temperature T as a function of the number of chirps, R, per minute for the snowy tree cricket.