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Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

What is the average rate of change for this function for the interval from x=2 to x=4 ?