If the half-life of a decaying isotope is 10 years, which statement is true after 20 years? A. The relative numbers of parent and daughter nuclei cannot be determined B. The numbers of parent nuclei and daughter nuclei in a sample are equal. C. There are more daughter nuclei than parent nuclei in a sample. D. There are more parent nuclei than daughter nuclei in a sample.

C is correct.

after two half lives

¼ of the parent nuclei will remain,¾ will be daughter nuclei

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.

it is the second option.