How to find volume of hemisphere?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

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.

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?