The area of the base of the cone is 9π^2 in and a height of 6 in. What is the volume of the cone, in terms of π? Need answer ASAP!

Part 1:

Let 

      Q₁ = Amount of the drug in the body after the first dose.
      Q₂ =  250 mg

As we know that after 12 hours about 4% of the drug is still present in the body.
For Q₂,
we get:
             Q₂ = 4% of Q₁ + 250
                   = (0.04 × 250) + 250
                   = 10 + 250
                   = 260 mg

Therefore, after the second dose, 260 mg of the drug is present in the body.

Now, for Q₃ :

We get;
           Q₃ = 4% of Q2 + 250
                = 0.04 × 260 + 250
                = 10.4 + 250
                = 260.4

For Q₄,
We get;
           Q₄ = 4% of Q₃ + 250 
                 = 0.04 × 260.4 + 250
                 = 10.416 + 250 
                 = 260.416

Part 2:
To find out how large that amount is, we have to find Q₄₀.
Using the similar pattern

for Q₄₀,
We get;
            Q₄₀ = 250 + 250 × (0.04)¹ + 250 × (0.04)² + 250 × (0.04)³⁹

Taking 250 as common;

            Q₄₀ = 250 (1 + 0.04 + 0.042 + ⋯ + 0.0439)
                  = 2501 − 0.04401 − 0.04
            Q₄₀ = 260.4167

Hence, The greatest amount of antibiotics in Susan’s body is 260.4167 mg.

Part 3:
From the previous 2 components of the matter, we all know that the best quantity of the antibiotic in Susan's body is regarding 260.4167 mg and it'll occur right once she has taken the last dose. However, we have a tendency to see that already once the fourth dose she had 260.416 mg of the drug in her system, that is simply insignificantly smaller. thus we will say that beginning on the second day of treatment, double every day there'll be regarding 260.416 mg of the antibiotic in her body. Over the course of the subsequent twelve hours {the quantity|the quantity|the number} of the drug can decrease to 4% of the most amount, that is 10.4166 mg. Then the cycle can repeat.