The energy expended by a bird per day, E, depends on the time spent foraging for food
Chapter 4, Problem 34(choose chapter or problem)
The energy expended by a bird per day, E, depends on the time spent foraging for food per day, F hours. Foraging for a shorter time requires better territory, which then requires more energy for its defense.3 Find the foraging time that minimizes energy expenditure if E = 0.25F + 1.7 F2 .
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