- Circle the letter of the sentence that explains why no machine is 100 percent efficient a. Electrical energy is converted to mechanical energy by fuel. b. Mechanical energy is converted to thermal energy by friction C. Thermal energy is converted to mechanical energy by friction. d. Mechanical energy is converted to electrical energy by a spark

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.