### Home > CCA2 > Chapter 3 > Lesson 3.1.3 > Problem 3-55

3-55.

If the cooling system in a light-water nuclear reactor is shut off, the temperature of the fuel rods will increase. The temperature of the fuel rods during the first hour could be modeled by the equation , where

*t*is the time in seconds, and

*T*is the temperature of the fuel rods in degrees Fahrenheit.

**Average rate of change**can be calculated by finding the slope between two points. Find the average rate at which the temperature changes for the first 30 minutes. Homework Help ✎

To find the average rate of temperature change for the first 30 minutes, find the points *t* is the time in seconds.