How can two objects of similar shape and size have different densities?

Because its what its made out of, its the same thing as a pound of bricks and a pound of feathers. the feathers are more denser because it takes more to make a pound. I hope this helps.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying