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:
https://brainly.com/question/32634451
#SPJ11