Final answer:
The question contained a typo related to the temperature change. Assuming the temperature was 5°F initially and decreased further, we subtract 18°F to find the new temperature, which is -13°F.
Step-by-step explanation:
The original question seems to have been posed with a typo, and the student is asking about a change in temperature. The student mentions that the temperature was 5°F upon waking up and later states that it decreased to 13°F. However, if the temperature decreased, the number should be lower than the starting temperature. Assuming the correct change would be an increase in cold, meaning the temperature dropped further, let's use math to clarify:
If the temperature decreased from the initial 5°F, and the resulting temperature was -13°F (which is lower than 5°F), then the original question should be rephrased as: "The temperature was 5°F when he woke up, and then it decreased by 18°F. What was the new temperature?"
In this case, to find the new temperature after the decrease, you would subtract the decrease from the original temperature:
- Original temperature = 5°F
- Temperature decrease = 18°F
- New temperature = Original temperature - Temperature decrease
- New temperature = 5°F - 18°F
- New temperature = -13°F
So the new temperature, after the decrease, would be -13°F.