Question

which letter represents a 20° increase from the given temperature?

Explanation:

Step1: Identify current temperature

The current temperature is $50^{\circ}$ as shown on the thermometer.

Step2: Calculate increased temperature

Add $20^{\circ}$ to the current temperature: $50 + 20=70^{\circ}$.

Step3: Locate on thermometer

On the thermometer, the letter corresponding to $70^{\circ}$ is C.

Answer:

C