. An air-traffic controller observes two aircraft on his

radar screen. The first is at altitude 800 m, horizontal

distance 19.2 km, and 25.0° south of west. The second

aircraft is at altitude 1

100 m, horizontal distance

17.6 km, and 20.0° south of west. What is the distance

between the two aircraft? (Place the

x

axis west, the

y

axis south, and the

z

axis vertical​

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.

The effect of alcohol varies from one person to another, mostly because it depends on the blood alcohol concentration, or bac. what does blood alcohol concentration not depend on? a. amount of food in the stomach b. gender and size of the drinker c. rate of consumption d. time of drinking

Why is mental-emotional health important? check all that apply. encourages others one feel better improves physical fitness fosters better relationships one do better in school enables one to enjoy free time