Answer:

Step-by-step explanation:

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 
450,500 because 120,000 and 330,000 and 500 thats the answer
So it work like this
180-72= 108
x+4=108
x=108-4
x=104
Answer:
56 times 52 times 76 divide by 4 = ? times 3 dont forget to add cm cubed at the end
Step-by-step explanation: