Question

The high temperatures for the first five days in December were as follows: 28°, 3°, -2°, -4°, and 12°. What is the average high temperature of the five days? If the next day is 0°, would the average of the six days increase or decrease?

A) Average: 7.83°, Decrease
B) Average: 7.83°, Increase
C) Average: 7°, Decrease
D) Average: 7°, Increase

Answer 1

The average high temperature for the first five days of December is 7.4°. Adding a day with a 0° temperature will decrease the average to approximately 6.17°, so the correct answer is D) Average: 7°, Decrease.

Step-by-step explanation:

To find the average high temperature for the first five days in December, we add the daily high temperatures and divide by the number of days:

(28° + 3° + (-2°) + (-4°) + 12°) / 5 = 37° / 5 = 7.4°

The average high temperature for the first five days is 7.4°. If the temperature on the next day is 0°, then the new average will be:

(37° + 0°) / 6 = 37° / 6 ≈ 6.17°

Therefore, adding a day with a 0° temperature will decrease the average high temperature, which makes the correct answer D) Average: 7°, Decrease.