Consider the following word problem: The temperature readings for 20 days at 9 AM at a local ski resort were recorded as follows: 19°, 6°, −5°, −4°, −2°, 12°, −3°, 17°, 23°, 8°, 8°, 2°, 28°, 4°, −2°, −9°, −3°, 21°, 25°, 0°. What was the average of the recorded temperatures for these 20 days? Round your answer to the nearest tenth.

To find the average of the recorded temperatures for the 20 days, we need to follow these steps:

Add Up All the Temperatures : First, we calculate the sum of all the temperatures recorded over the 20 days.
The temperatures given are: 19°, 6°, -5°, -4°, -2°, 12°, -3°, 17°, 23°, 8°, 8°, 2°, 28°, 4°, -2°, -9°, -3°, 21°, 25°, 0°.
Sum = 19 + 6 - 5 - 4 - 2 + 12 - 3 + 17 + 23 + 8 + 8 + 2 + 28 + 4 - 2 - 9 - 3 + 21 + 25 + 0.
Performing the addition step-by-step:

First, calculate the positive temperatures: 19 + 6 + 12 + 17 + 23 + 8 + 8 + 2 + 28 + 4 + 21 + 25 = 173.
Next, calculate the sum of the negative temperatures: -5 - 4 - 2 - 3 - 2 - 9 - 3 + 0 = -28.
Finally, add the totals of positive and negative sums: 173 + (-28) = 145.


Divide by the Number of Days : Now that we have the total sum of temperatures, we divide by the number of days (which is 20) to find the average.
Average Temperature = 20 145 ​ = 7.25

Round to the Nearest Tenth : The average is 7.25, which rounded to the nearest tenth is 7.3.


Therefore, the average temperature over the 20 days is 7.3° .

Answered by OliviaLunaGracy | 2025-07-21

To find the average temperature over 20 days, we sum all recorded temperatures, which equals 145. Dividing this by the number of days (20) gives an average of 7.25, which rounds to 7.3. Thus, the average temperature is 7.3°.
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Answered by OliviaLunaGracy | 2025-07-25