There will be [tex]51.07[/tex] billion virus particles in a person’s body 3 days after being infected.
Step-by-step explanation:
Step 1:
[tex]y=-0.73 x^{4}+3.1 x^{2}+26.5[/tex]
The number of flu particles in a person's body in the billions is represented by y and x represents the number of days after which they have been infected.
So if we need to calculate the number of flu particles in a person's body at any instant of time we just substitute the value of x in y.
Step 2:
To calculate the number of flu virus particles in a person's body after 3 days, we must substitute [tex]x=3[/tex] in y.
[tex]y=-0.73(3)^{4}+3.1(3)^{3}+26.5=-59.13+83.7+26.5=51.07[/tex]
So 3 days after being infected there will be [tex]51.07[/tex] billion flu virus particles in that particular person's body.
