Barrons AP Calculus - David Bock

(dmanu) #1

  1. (C) Since the strip of the city shown in the figure is at a distance r mi from the highway, it is
    mi long and its area is The strip’s population is approximately 2(12 − 2r)
    Δr. The total population of the entire city is twice the integral as it
    includes both halves of the city.

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