I need to know the amount of Iodine -131 remaining after 72 days
1 answer:
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Answer:
Whenever .
Step-by-step explanation:
We can play around with some numbers and develop some rules for this equation.
Note that the number 5 and -5 are used here, so let's try using 5 as a.
So 5 works. Let's try a random number like 3.
Okay, with this info we know that we might be able to develop one rule that . Just to test, let's try 0, -3, and -5.
Zero works.
-3 works.
-5 works. Now, this might stop here making the equation , so let's test a number outside of -5 - say -20.
Yes! This works, so a works for this equation as long as .
Hope this helped!