Answer: Your welcome!
Step-by-step explanation:
The rate of cooling of the lake of water depends on the difference between the initial temperature of the lake and the air temperature. Since the initial temperature of the lake is not given, it is impossible to answer the question. However, if the initial temperature of the lake is known, then Newton's Law of Cooling can be used to calculate the time it takes for the temperature of the lake to drop to the desired temperature. The equation for this is:
Time = (Initial Temperature - Desired Temperature)/Rate of Cooling
where Rate of Cooling is the difference between the initial temperature of the lake and the air temperature.