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The problem you provided involves finding the maximum profit from producing and selling *x* packs of tempe chips. Here’s a breakdown of the problem:

1. **Cost Function**:
   \[
   C(x) = \left( \frac{1}{4}x^2 + 25x + 25 \right) \text{ (in thousand rupiah)}
   \]

2. **Revenue Function**:
   Each pack of tempe chips is sold at the price:
   \[
   P(x) = \left( 55 - \frac{1}{2}x \right) \text{ (in thousand rupiah)}
   \]
   So, the total revenue for *x* packs is:
   \[
   R(x) = x \times P(x) = x \times \left( 55 - \frac{1}{2}x \right)
   \]

3. **Profit Function**:
   Profit is the difference between the revenue and the cost:
   \[
   \text{Profit}(x) = R(x) - C(x)
   \]

Let’s calculate the profit function and find its maximum value by determining the critical points. I’ll do the necessary steps now.The maximum profit is obtained when producing and selling 20 packs of tempe chips, and the maximum profit is Rp275,000.00.

Thus, the correct answer is **A. Rp275,000.00**.

Would you like further details on how the calculations were performed? Here are some related questions you might find helpful:

1. How do we derive the cost and revenue functions?
2. What is the significance of taking the derivative in maximizing profit?
3. How do you solve quadratic equations to find critical points?
4. What role does concavity play in identifying a maximum?
5. How can we use similar optimization techniques in real-world business problems?

**Tip**: For optimization problems like these, remember that maximizing profit often involves taking derivatives of the profit function and solving for critical points where the derivative is zero.

Biaya untuk memproduksi x bungkus keripik tempe adalah (1/4)x^2 + 25x + 25 ribu rupiah. Jika setiap bungkus keripik dijual dengan harga (55 - 1/2 x) ribu rupiah, maka keuntungan maksimum yang dapat diperoleh adalah....

This problem explores how to maximize profit by analyzing cost and revenue functions modeled by quadratic equations. Learn to apply optimization techniques using derivatives to find critical points, suitable for students in Grades 10-12.

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