If the original mass of the radioactive material is 500 grams, what will be its mass after 6 billion years?

3.4 grams
7.8 grams
15.6 grams
31.2 grams

Question

If the original mass of the radioactive material is 500 grams, what will be its mass after 6 billion years?
 	
	3.4 grams
	7.8 grams
	15.6 grams
	31.2 grams

watermelon14 · Answer

@thomaster

shane_b · Answer

Those are some pretty exact answers considering the graph is not very detailed.  Is there more info?

watermelon14 · Answer

no that is all the information. sorry. i don't get it either

watermelon14 · Answer

@evilmath

shane_b · Answer

Then I can only venture an educated guess.  Based on the fact the curve is somewhere around 3% at the 6 billion year mark.  My guess would be 15.6 grams.

shane_b · Answer

If you think the curve looks like it's a little less than 3% then go with 7.8 grams :)

watermelon14 · Answer

hmmm. I think it is 15.6 more but i am not sure. I will probably go with that. Thankss!!!!!!

anonymous · Answer

15.6 gram i would say

watermelon14 · Answer

Thanks!:)

anonymous · Answer

all the others are too far from the graph's numbers it wouldn't make sense

watermelon14 · Answer

Yep! :)