AP Calculus CHAPTER 5 WORKSHEET INTEGRALS ANSWER KEY Net Change 1. ³w t dt 10 5 ' is the net change in the child’s weight measured in pounds from 5 to 10 years of age. 2. ³R t dt 120 0 is the amount of oil leaked from the tank measured in gallons from 0 to 120 minutes. 3. ³n t dt 15 0 100 ' is the bee population measured in bees 15 weeks ...