A solution is heated from 0°C to 100°C. Between 0°C and 50°C, the rate of temperature increase is 1.5°C/min. Between 50°C and 100°C, the rate of temperature increase is 0.4°C/min.

Question

anonymous · Answer

What is the average rate of temperature increase during the entire heating process? Round to the nearest tenth.

anonymous · Answer

@CGGURUMANJUNATH can you help?

anonymous · Answer

Can you help me @mathmale ?

mathmale · Answer

Ric:  determine the beginning and ending values of the temperature.  You've already stated them.  How long is the time interval overall?  Divide that time period into the change in T, and the result will be the average rate of change of T with respect to time t.  
The only real challenge here is the determination of the time interval elapsed during each of the two heating intervals.

Recall:

change in T
------------- = time
rate of change

anonymous · Answer

Hey, for some reason in my work program, the system wasn't letting me type down any answers. And that was the last question I had left. I called my teacher and she said not to worry, she wouldn't count that question against me. I still had a 95% on the assignment already. So it wasn't a big deal. But thank you! I have to leave now, I have a band practice to go to! Thank you @mathmale !!

mathmale · Answer

My great pleasure!  Again, I wish you all the best on your SAT, and am SO glad y ou've contacted your teacher for clarification!