Answer:THE ANSWER IS B MY GUY
Step-by-step explanation:
Answer:
The substance half-life is of 4.98 days.
Step-by-step explanation:
Equation for an amount of a decaying substance:
The equation for the amount of a substance that decay exponentially has the following format:

In which k is the decay rate, as a decimal.
k-value of 0.1392.
This means that:

Find the substance's half life, in days.
This is t for which
. So







The substance half-life is of 4.98 days.
4,3 x is the first number then y
Answer:
xxxxxxxx
Step-by-step explanation:
x
About $0.37 because you divide $4.49 by 12