Urgent plz ! will give !
you are given a box of 100 silver dollars, all facing heads up. you are instructed to shake the box 3 times; after the second shake, you will remove all the dollars that are heads up before shaking again. you may keep all the dollars that are still tails up following the third shake. how many dollars will you most likely get to keep?

6
12
25
50

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

allowed for the prediction of the properties of missing elements.

what are the options? add them, then i will be glad to .