On a given morning the temperature was 81°F. The temperature dropped 9°F and then rose 5°F. How much does the temperature need to rise or fall to return to the initial temperature of 81°F?(1 point)Responses
The temperature dropped 9°F and then rose 5°F.
To return to the initial temperature of 81°F, the temperature needs to rise by 9°F.
To return to the initial temperature of 81°F, we need to find the combined change in temperature caused by the drop of 9°F and the rise of 5°F.
First, let's calculate the total change in temperature:
Drop in temperature: -9°F
Rise in temperature: +5°F
To find the combined change, we add the drop and rise:
-9°F + 5°F = -4°F
Therefore, the temperature needs to rise by 4°F to return to the initial temperature of 81°F.
To calculate how much the temperature needs to rise or fall to return to the initial temperature of 81°F, we can follow these steps:
Step 1: Start with the given initial temperature of 81°F.
Step 2: Subtract the temperature drop of 9°F from the initial temperature: 81°F - 9°F = 72°F.
Step 3: Add the temperature rise of 5°F to the result from step 2: 72°F + 5°F = 77°F.
Step 4: Finally, subtract the result from step 3 from the initial temperature of 81°F: 81°F - 77°F = 4°F.
Therefore, the temperature needs to rise or fall by 4°F to return to the initial temperature of 81°F.