The temperature on January 19th would be -8 °F
<h3 /><h3><u>Calculating temperatures</u></h3>
From the question,
We are to determine what the temperature would be on January 19th
From the given information,
Temperatures can decrease by 20°F per week in the month of January.
On January 12th, the temperature was 12 °F.
January 19th will be a day on the week following the week of January 12th.
Therefore, the temperature would have decreased by 20 °F on January 19th.
The temperature on January 19th would be
12 °F - 20 °F = -8 °F
Hence, the temperature on January 19th would be -8 °F
Learn more on calculating temperatures here: brainly.com/question/4600267
