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
Rise 4°
Rise 4 degrees
Rise 9°
Rise 9 degrees
Fall 4°
Fall 4degree
Fall 5°
Rise 4°
To return to the initial temperature of 81°F, the temperature needs to rise 4°F.
To find out how much the temperature needs to rise or fall to return to the initial temperature of 81°F, we need to calculate the net change in temperature.
First, let's calculate the change in temperature when it dropped 9°F. We subtract 9 from the initial temperature of 81°F: 81°F - 9°F = 72°F.
Next, let's calculate the change in temperature when it rose 5°F. We add 5 to the previous temperature of 72°F: 72°F + 5°F = 77°F.
Now, to find out how much the temperature needs to rise or fall to return to 81°F, we subtract 81°F (initial temperature) from the current temperature (77°F): 81°F - 77°F = 4°F.
Therefore, the temperature needs to rise 4°F to return to the initial temperature of 81°F. So the correct response is "Rise 4 degrees."