What is the square root of x?

Which choice represents the sample space ,s for this event

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.