Answer:
The temperature of the water when the first race started was 78.1 degrees
Step-by-step explanation:
Addition
The temperature of the water of a pool was 72.5 degrees when the swimmers first arrived.
By the time when the first race started, the temperature had increased by 5.6 degrees.
To find the temperature at that very moment we have to add 72.5 degrees + 5.6 degrees = 78.1 degrees
The temperature of the water when the first race started was 78.1 degrees
