Answer:
3 strain would still alive after 48 hours
Step-by-step explanation:
Initial population of virus = 40000 grams
A certain virus is dying off at a rate of 18% per hour.
We are supposed to find how much of the strain would still be alive after 48 hours
Formula : 
=Initial population
N(t)= Population after t hours
r = rate of decrease = 18% = 0.18
t = time = 48 hours
So,the strain would still be alive after 48 hours=
Hence 3 strain would still alive after 48 hours
Answer:

Step-by-step explanation:

Subtract 2 from both sides:


Subtract 5x from both sides:


Divide both sides by 2:


There would be 8 whole(s) in total.
X = 0.4/3
x = 13
if answer is wanted in decimal form.