rachel is planning to run an average of 6.4 miles over three consecutive days. on the first day, she ran 6.6 miles, and on the second day she ran 6.5 miles. what is the maximum number of miles rachel can run on the third day without going over the planned average of 6.4 miles per day?

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.