SOLUTION: 3. One day, the temperature at 2:00 A.M. was 43°F, and by 3:00 P.M. the temperature was 56°F. What was the hourly rate of temperature change? A) 3°F/h B) 2°F/h C) 0°

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: 3. One day, the temperature at 2:00 A.M. was 43°F, and by 3:00 P.M. the temperature was 56°F. What was the hourly rate of temperature change? A) 3°F/h B) 2°F/h C) 0°      Log On


   

Question 46529: 3. One day, the temperature at 2:00 A.M. was 43°F, and by 3:00 P.M. the temperature was 56°F. What was the hourly rate of temperature change?
A) 3°F/h B) 2°F/h C) 0°F/h D) 1°F/h
Answer by wuwei96815(245) About Me  (Show Source):
You can put this solution on YOUR website!
I think that this problem is fairly easy, but who knows?

First, let's use the 24 hour time system. 2:00 A.M. becomes 0200. 3:00 P.M. becomes 1500. The difference between 0200 and 1500 is 1300 or 13 hours.

Rate of change should = change divided by time
= 56F-43F/13 hours
= 13F/13 hours
= 1 dgree F/h

The answer is D). What do you think?