Question

alex measured the temperature of a lake with two different thermometers. one gave him a reading of 25°. the other gave him a reading of 77°. which was celsius? select one of two 77 degrees 25 degrees remaining attempts: 1

Explanation:

Step1: Recall Celsius-Fahrenheit relation

The formula to convert Celsius to Fahrenheit is $F = \frac{9}{5}C + 32$. Lake water temperature is typically around 0 - 30°C. Let's check both values.

Step2: Check 25°C conversion

For $C = 25$, $F=\frac{9}{5}(25)+32 = 45 + 32 = 77°F$.

Step3: Check 77°C conversion

For $C = 77$, $F=\frac{9}{5}(77)+32 = 138.6 + 32 = 170.6°F$, which is too hot for a lake. So 25 degrees is Celsius.

Answer:

25 degrees