The mass of iron in planet Earth is 2.090 x 1024 kg. Given that the Earth has a mass of 5.972 x 1024 kg, find the
percentage of the Earth's mass that is iron.

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.

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.

You work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?