Answer:
The temperature was -26.1° f at 2:30 am.
Explanation:
* In this type of problems, we must think about
- What is the meaning of wards;
above and below or
raised and dropped or
increased and decreased
- For above , raised , increase
we will add the value of them to the initial value
- For below , dropped , decreased
we will subtract the value of them from the initial value
* In our problem:
- The reading of thermometer is -17° f at 1:00 am.
- The temperature has dropped 9.1° f when the time was 2:30 am.
* Lets use the explanation above
- We will subtract 9.1 from -17
∴ -17 - 9.1 = -26.1° f
* The temperature was -26.1° f at 2:30 am.