Answer: 
Step-by-step explanation:
We know that the general form of the exponential decay formula is
, where y is final amount remaining after t time, A is the original amount and r is the rate of decay
Now, the ratio of strontium-90 remaining, p , as a function of years, t , since the nuclear accident. 
Hence, the ratio of remaining since the nuclear accident is
as the following pic you can see the answer.
#diameter is 8 so radius is 4
Answer:
3 units up
Step-by-step explanation:
when the y intercept goes u, so does the line
Answer:
because it has two parts
Step-by-step explanation:
thats what the first one is
Yes 81 is divisible by 3
the answer is 27
because 81 divided by 3 = 27
