4.3 a heat engine, operating on a carnot cycle and having thermal efficiency of 80%, receives heat from a heat source at 1200°c. the power output of the engine is 500 kw. determine: a) the rate at which heat is supplied to the engine in kj/h. b) the rate at which heat is rejected to the sink in kj/h. c) the temperature of the heat sink in °c. 4.4 he a ting on innvironmental che dicen the u ssrw determ unit and the mate w 4.5 for -45 fon

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Which system of linear inequalities is represented by the graph? !

How to determine whether two known pairs of points are on the same line.