Which situation best illustrates the barter system of exchange? A. Trading a computer for a smartphone B. Selling a used car over the Internet C. Buying new clothes at a mall O D. Eating vegetables grown in your garden ​

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score