Explain how density of a stone could be determined?

1one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.2 this being so, my trip demanded that i leave my name and my identity at home.3 i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.4 with all this in mind i wrote to the head office of a great corporation which manufactures trucks.

Jacob because it says john had $900 which means he spent it. jacob has $900 which means he still have it. and alex has $200 which mean he spent his