I WILL MEDAL AND FAN, 1 QUICK QUESTION!!!
You started with 64 g of a radioactive substance. If you have 4.0 g of that substance left, then how many half-lives have elapsed?

5

4

3

2

Question

I WILL MEDAL AND FAN, 1 QUICK QUESTION!!!
You started with 64 g of a radioactive substance. If you have 4.0 g of that substance left, then how many half-lives have elapsed?

       5

       4

       3

       2

sparrow2 · Answer

i thinks it's 3

sparrow2 · Answer

firstly 64:2=32 then 32:2=16 then 16:2=8 then 8:2=4   so it's 4 sorry

anonymous · Answer

wait option four or the actual number four? @sparrow2

sparrow2 · Answer

actual numebr 4 so option 2

anonymous · Answer

thanks! could you help me on a few other separate questions? ill give you a separate medal for each? @ sparrow2