5 mi B (a) Use the fact that 12 mi energy used = energy per mile x miles flown. to show that the total energy used by the bird is modeled by the function E(X) = 18√√x² + 25 + 12(12 - x). flying from A to C is 18V 25 + x² E(x) = 18√x² + 25 + 12(12-x). Need Help? Read It nesting area Let x be the distance from point B to C, in miles. Then the distance from A to C is √ 25+x4 D , and the distance from C to D is 12-x and the energy used in flying from C to D is 12(12-x) Therefore, the total energy is given by (b) If the bird instinctively chooses a path that minimizes its energy expenditure, to what point does it fly? (Round your answer to one decimal place.) X = 6 x mi . The energy used in

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