Answer:
I think it's y=1/5x
The answer is 5.5
Step-by-step explanation:
2%
20% takes 10 years to decay
To find per year decay, we divide the percentage by the number of years, so we get unit rate of years {per year]. Thus we have:
20%/10 = 2% per year
It's that simple.
Hence, the percentage by which the substance decays each year is 2%
Answer 17400
-9 and -8 ...............
