The polynomial

y=−0.73x4+3.1x3+26.5

describes the billions of flu virus particles in a person’s body x days after being infected. Find the number of virus particles, in billions, after 3 days.

There are billion virus particles in a person’s body 3 days after being infected.

There will be billion virus particles in a person’s body 3 days after being infected.

Step-by-step explanation:

Step 1:

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 in y.

So 3 days after being infected there will be billion flu virus particles in that particular person's body.

29.5977692753

step-by-step explanation:

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17