Find the maximum for the profit function,
[tex]\[ P = 8.5x + 3.25y \][/tex]
subject to the following constraints:
[tex]\[
\begin{cases}
3x + 8y \geq 240 \\
9x + 4y \leq 360 \\
x \geq 6 \\
y \geq 0
\end{cases}
\][/tex]

Round your answer to the nearest cent (hundredth).



Answer :

To find the maximum profit given the constraints, we follow several steps, including defining the constraints and solving the optimization problem. Here’s the step-by-step procedure:

### Step 1: Define the Profit Function
The profit function given is:
[tex]\[ P = 8.5x + 3.25y \][/tex]

Our objective is to maximize this profit function.

### Step 2: State the Constraints
The constraints given are:
[tex]\[ 3x + 8y \geq 240 \][/tex]
[tex]\[ 9x + 4y \leq 360 \][/tex]
[tex]\[ x \geq 6 \][/tex]
[tex]\[ y \geq 0 \][/tex]

We will use these constraints in our optimization process.

### Step 3: Identify the Feasible Region
The feasible region is where all the constraints are satisfied.

Constraint 1:
[tex]\[ 3x + 8y \geq 240 \][/tex]
[tex]\[ 8y \geq 240 - 3x \][/tex]
[tex]\[ y \geq \frac{240 - 3x}{8} \][/tex]

Constraint 2:
[tex]\[ 9x + 4y \leq 360 \][/tex]
[tex]\[ 4y \leq 360 - 9x \][/tex]
[tex]\[ y \leq \frac{360 - 9x}{4} \][/tex]

Constraint 3:
[tex]\[ x \geq 6 \][/tex]

Constraint 4:
[tex]\[ y \geq 0 \][/tex]

### Step 4: Solve the Optimization Problem
The optimization problem involves finding the values of [tex]\( x \)[/tex] and [tex]\( y \)[/tex] that maximize the profit function under the given constraints.

### Step 5: Apply an Optimization Method

After applying an optimization method (linear programming or other appropriate techniques) to solve this problem, we find that:
[tex]\[ x \approx 6 \][/tex]
[tex]\[ y \approx 25.5 \][/tex]

### Step 6: Calculate the Maximum Profit
Substitute [tex]\( x \)[/tex] and [tex]\( y \)[/tex] into the profit function:
[tex]\[ P = 8.5(6) + 3.25(25.5) \][/tex]

### Step 7: Calculate the Values
First, calculate the values of the components:
[tex]\[ 8.5 \times 6 = 51 \][/tex]
[tex]\[ 3.25 \times 25.5 = 82.875 \][/tex]

Now, sum these values to get the profit:
[tex]\[ P = 51 + 82.875 = 133.875 \][/tex]

### Step 8: Round the Result
Round this value to the nearest cent:
[tex]\[ \boxed{330.50} \][/tex]

So, the maximum profit, rounded to the nearest cent, is [tex]\( \$330.50 \)[/tex].