Question

You bought some new fish and need the tank ready. You fill the tank with water and start running the filter system.You check the temperature of the water after 2 hours and notice the water is 78 degrees Fahrenheit. You need the temperature to be at 72 degrees Fahrenheit. after three additional hours and the water temperature is at so, you add the fish. What was the temperature when you first filled the tank?

Answer 1

82 degrees

Explanation:

It took 3 hours for it to go from 78 to 72.

Which is a rate of -2 degrees per hour

We want to know what the temperature was two hours before it was 78 degrees so we'd do 78 - (-2) which is 82