Answer:

Step-by-step explanation:
Using the formula for the exponential decay that is
, we have N=
,
and k=0.1374.
Thus,
becomes



Taking log on both sides, we get




.690 because 6 rounds up to 10 so it would go up to the next tenth
Answer:
b
Step-by-step explanation:
Answer:
4,318÷7= 617
I have already rounded the decimal to make it into a whole.