Final answer:
To order the temperatures from greatest to least: 5°F, 3°F, -7°F, and -8°F. Positive temperatures are warmer than negative ones.
Step-by-step explanation:
The student's task is to order the given temperatures from greatest to least. To do this, we need to arrange the temperatures in descending order, keeping in mind that negative temperatures are colder than positive ones. Therefore, the order from greatest to least is 5°F, 3°F, -7°F, and -8°F.