I was doing this problem, regarding area and estimating with finite sums. The problem asked to to estimate the length of a road a car traveled on. It gave me a table that gives me second in intervals of 10, and the corresponding velocity. I read that evaluating at right endpoints should give you a lower sum and evaluating at left endpoints gives you a upper sum. So i eveluated at the right enpoints and got a high sum or a bigger sum, then what i got when i evaluated at the left points. Should i get a lower sum at the right engpoints and a higher sum a the left endpoints?

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