If we start with 10000 atoms of radium-226, how much would remain after 3,200 years?

Iwll give extra points to who gets this for ! what type of reaction is this? ?

Non renewable resources like petroleum eventually

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?