Half- life decay candy experiment

Question

anonymous · Answer

Go back to your data table and for each three-second interval divide the number of candies decayed by the number previously remaining and multiply by 100. Show your work.

anonymous · Answer

Time (seconds)	Radioactive atoms remaining (not decayed)	Atoms decayed
0	                                        200	                                               0
3	102	98
6	55	47
9	25	30
12	17	8
15	11	6
18	8	3
21	7	1
24	5	2
27	4	1
30	2	2

anonymous · Answer

what does it mean by "divide the number of candies decayed by the number previously remaining". I already got the table...

frostbite · Answer

Sounds like you are going to calculate the percentage of atoms decayed, we call the number P:
$$\large P=\frac{candy _{after} }{ candy _{before} }*100 \%$$

frostbite · Answer

No idea why you have to however.

anonymous · Answer

I don't really know either. So will it be like 98 / 200 ?

frostbite · Answer

Yea and multiply with 100%

frostbite · Answer

no idea why they don't write percentage in the question but it does not make any sense if not ;)

frostbite · Answer

But that show you know some math :)

anonymous · Answer

okay. Thank you!!! For some reason i got confused by what they meant by previously remaining

frostbite · Answer

Not a problem, some times you just need to hear it from others and then everything become clear.