Answer: the answer is 4
Step-by-step explanation:
when looking for the half life, it says to look for when the initial amount is half of what it used to be, because it is 100, 100 divided by 2 is 50, and when looking at the hours (x value) for 50 it says 4.
Answer:

Step-by-step explanation:
Step-by-step explanation:



You would multiply 2 1/2 and 3 3/4, which would give you 9.375 or as a mixed number 9 7/8