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The temperature at 4 a.m. was -13 degrees F. The temperature was rising at a steady rate of 5 degrees per hour. At what time will the temperature be 12 degrees F?

Answer :

Final answer:

To reach 12 degrees from -13 degrees, a rise in temperature of 25 degrees is needed. This would take 5 hours at a rate of 5 degrees per hour. Therefore, the temperature will reach 12 degrees F at 9 a.m.

Explanation:

This question can be solved by using the concept of linear equations. At 4 a.m. it was -13 degrees F. We know that the temperature is rising steadily by 5 degrees every hour. To reach 12 degrees from -13 degrees, the difference or the rise in temperature needed is 12 - (-13) = 25 degrees. Since the temperature rises 5 degrees each hour, it would take 25/5 = 5 hours to reach 12 degrees. So, the temperature will reach 12 degrees F at 4 a.m. + 5 hours = 9 a.m.

Learn more about Linear Equations here:

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