Answer:
Step-by-step explanation:
-1+8=7
To solve this we are going to use the half life equation

Where:

is the initial sample

is the time in years

is the half life of the substance

is the remainder quantity after

years
From the problem we know that:



Lets replace those values in our equation to find

:




We can conclude that after 1600 years of radioactive decay, the mass of the 100-gram sample will be
91.7 grams.
Answer:
AB = 32
Step-by-step explanation:
Since line l bisects AB at point M, we have AM = MB.



AM = 4(4) = 16, MB = 5(4) - 4 = 16.
So AB = AM + MB = 16 + 16 = 32.
I would go with D, it looks like it is the most linear out of the rest, Hope it helps:)