Suppose Mika has budget of $600 for only two goods, x and y. The price of a Good X is $10 and the price of good Y is $25. Mika's utility function for Good x and Good y is: U(x, y) = 2xy. Suppose the price of a Good X increases to $15. a. What is Mika's initial basket when the price of a Good X is $10? b. How much utility does this basket generate for Mika? c. What is Mika's final consumption basket when the price of Good X increases to $15?

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Chapter1: Making Economics Decisions
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### Utility Maximization Problem

Suppose Mika has a budget of $600 for only two goods, \( x \) and \( y \). The price of Good \( x \) is $10, and the price of Good \( y \) is $25. Mika’s utility function for Good \( x \) and Good \( y \) is: \( U(x, y) = 2xy \).

Suppose the price of Good \( x \) increases to $15.

#### Questions:
a. What is Mika’s initial basket when the price of Good \( x \) is $10?

b. How much utility does this basket generate for Mika?

c. What is Mika’s final consumption basket when the price of Good \( x \) increases to $15?

---

**Explanation:**

To solve this problem, we need to perform the following steps:

1. **Determine the initial quantities of Good \( x \) and Good \( y \) that maximize Mika's utility given her budget and initial prices.**
   
2. **Calculate the utility generated by this initial basket using the utility function \( U(x, y) = 2xy \).**
   
3. **Recalculate the optimal quantities of Good \( x \) and Good \( y \) after the price of Good \( x \) increases and compute the final consumption basket.**

**a. Initial Basket**

Initially, the prices of Good \( x \) and Good \( y \) are $10 and $25 respectively. The budget constraint is given by:
\[ 10x + 25y = 600 \]

To maximize the utility function: 
\[ U(x, y) = 2xy \]

Given the budget constraint, solving the system of equations will provide the optimal quantities of \( x \) and \( y \).

**b. Utility Generated by Initial Basket**

Using the quantities of \( x \) and \( y \) derived from part (a), we can compute the utility generated by substituting these values into the utility function:
\[ U(x, y) = 2xy \]

**c. Final Consumption Basket**

After the price of Good \( x \) increases to $15, the new budget constraint becomes:
\[ 15x + 25y = 600 \]

Again, we need to determine the new optimal quantities of \( x \) and \( y \) that maximize Mika's utility given the updated budget constraint and compute the final
Transcribed Image Text:### Utility Maximization Problem Suppose Mika has a budget of $600 for only two goods, \( x \) and \( y \). The price of Good \( x \) is $10, and the price of Good \( y \) is $25. Mika’s utility function for Good \( x \) and Good \( y \) is: \( U(x, y) = 2xy \). Suppose the price of Good \( x \) increases to $15. #### Questions: a. What is Mika’s initial basket when the price of Good \( x \) is $10? b. How much utility does this basket generate for Mika? c. What is Mika’s final consumption basket when the price of Good \( x \) increases to $15? --- **Explanation:** To solve this problem, we need to perform the following steps: 1. **Determine the initial quantities of Good \( x \) and Good \( y \) that maximize Mika's utility given her budget and initial prices.** 2. **Calculate the utility generated by this initial basket using the utility function \( U(x, y) = 2xy \).** 3. **Recalculate the optimal quantities of Good \( x \) and Good \( y \) after the price of Good \( x \) increases and compute the final consumption basket.** **a. Initial Basket** Initially, the prices of Good \( x \) and Good \( y \) are $10 and $25 respectively. The budget constraint is given by: \[ 10x + 25y = 600 \] To maximize the utility function: \[ U(x, y) = 2xy \] Given the budget constraint, solving the system of equations will provide the optimal quantities of \( x \) and \( y \). **b. Utility Generated by Initial Basket** Using the quantities of \( x \) and \( y \) derived from part (a), we can compute the utility generated by substituting these values into the utility function: \[ U(x, y) = 2xy \] **c. Final Consumption Basket** After the price of Good \( x \) increases to $15, the new budget constraint becomes: \[ 15x + 25y = 600 \] Again, we need to determine the new optimal quantities of \( x \) and \( y \) that maximize Mika's utility given the updated budget constraint and compute the final
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