There are many apps that help find you cheaper gas. If the cost of a gallon of regular gas is $3 at one station and $3.50 at another gas station and your car takes 12 gallons to fill up your car. How much extra are you spending at the more expensive gas station? $5 $6 $7 $8

4. what is the reason for including the following code snippet in the header file animal.h? #ifndef animal_h #define animal_h class animal { public: animal(); animal(double new_area_hunt); void birth(); void hunt(double new_area_hunt); void death(); double get_area_hunt() const; private: double area_hunt; }; #endif