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At $12:00$ PM the temperature was forty-one degrees Celsius. At $3:00$ PM the temperature was forty degrees Celsius. When was it cooler? $\newline$ Choices: $\newline$ (A) $12:00$ PM $\newline$ (B) $3:00$ PM

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Compare temperatures above and below zero

Full solution

Q. At

12:00

PM the temperature was forty-one degrees Celsius. At

3:00

PM the temperature was forty degrees Celsius. When was it cooler?

\newline

Choices:

\newline

(A)

12:00

PM

\newline

(B)

3:00

PM

Compare temperatures: Compare the temperatures at the two times to determine when it was cooler. $\newline$ Temperature at $12$ : $00$ PM: $41\,^\circ\mathrm{C}$ $\newline$ Temperature at $3$ : $00$ PM: $40\,^\circ\mathrm{C}$ $\newline$ Since a lower temperature means it's cooler, we compare $41\,^\circ\mathrm{C}$ and $40\,^\circ\mathrm{C}$ .
Determine lower temperature: Determine which temperature is lower. 41\,^\circ\mathrm{C} > 40\,^\circ\mathrm{C}, so $40\,^\circ\mathrm{C}$ is cooler.

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