The descent after 16 seconds would be 672 feet, with the function -42•X and X=16 so -42•16=-672
16/5 is roughly equal to 3.2. Is that what your are asking?
Answer:
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The numbers of gallons bought every stop are extraneous...you can ignore them. Add 1.68, 1.76 and 1.65 together and divide the total by three. The average is 1.69
