21/05/2015 - Luis nos mandó un correo con 4 problemas que debíamos resolver. En cada forma debíamos explicar como resolvimos el problema.

One of the coldest days of the year saw the temperature (Fahrenheit) fail to 40 degrees below zero. On the news,which gives the temperature in both Fahrenheit and Celsius, the announcer stated with amazement that the Celsius temperature was also 40 degrees below zero.