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Oct 13, 2025 by miodeya.com 87 views

Mary Repairs Microwaves: A Mathematical Analysis of Revenue and Overhead Costs

Mary is a skilled microwave repair technician who earns a revenue based on the number of hours she spends repairing microwaves. Her revenue is modeled by the function $R(h) = 20h$ , where $h$ is the number of hours she spends repairing microwaves. In addition to her revenue, Mary also incurs overhead costs, which are modeled by the function $O = 120$ . In this article, we will analyze Mary's revenue and overhead costs to determine after how many hours she will break even.

Mary's revenue is modeled by the function $R(h) = 20h$ , where $h$ is the number of hours she spends repairing microwaves. This means that for every hour she spends repairing microwaves, she earns a revenue of $20. For example, if Mary spends 5 hours repairing microwaves, her revenue will be $R(5) = 20(5) = 100$ .

Mary's overhead costs are modeled by the function $O = 120$ . This means that her overhead costs are a fixed amount of $120, regardless of the number of hours she spends repairing microwaves.

To determine after how many hours Mary will break even, we need to set up an equation that represents the point at which her revenue equals her overhead costs. Let $h$ be the number of hours Mary spends repairing microwaves. Then, her revenue is $R(h) = 20h$ , and her overhead costs are $O = 120$ . We can set up the following equation:

R(h) = O

Substituting the expressions for $R(h)$ and $O$ , we get:

20h = 120

To solve for $h$ , we can divide both sides of the equation by 20:

h = \frac{120}{20}

h = 6

Therefore, Mary will break even after 6 hours of repairing microwaves.

To analyze the sensitivity of Mary's break-even point to changes in her revenue and overhead costs, we can perform a sensitivity analysis. Let's assume that Mary's revenue increases by 10% due to an increase in demand for her services. This means that her new revenue function is $R(h) = 22h$ . We can set up a new equation to represent the point at which her new revenue equals her overhead costs:

R(h) = O

Substituting the expressions for $R(h)$ and $O$ , we get:

22h = 120

To solve for $h$ , we can divide both sides of the equation by 22:

h = \frac{120}{22}

h = 5.45

Therefore, if Mary's revenue increases by 10%, she will break even after 5.45 hours of repairing microwaves.

In conclusion, Mary's revenue and overhead costs are modeled by the functions $R(h) = 20h$ and $O = 120$ , respectively. By analyzing these functions, we have determined that Mary will break even after 6 hours of repairing microwaves. Additionally, we have performed a sensitivity analysis to analyze the impact of changes in her revenue and overhead costs on her break-even point. This analysis has shown that if Mary's revenue increases by 10%, she will break even after 5.45 hours of repairing microwaves.

Based on our analysis, we recommend that Mary consider the following strategies to increase her revenue and reduce her overhead costs:

Increase demand for her services: Mary can increase demand for her services by marketing her services to a wider audience, offering discounts to new customers, and providing excellent customer service.
Reduce overhead costs: Mary can reduce her overhead costs by negotiating lower prices with her suppliers, reducing her energy consumption, and streamlining her operations.
Invest in new equipment: Mary can invest in new equipment that will enable her to repair microwaves more efficiently and effectively, reducing her overhead costs and increasing her revenue.

By implementing these strategies, Mary can increase her revenue and reduce her overhead costs, ultimately leading to increased profitability and growth for her business.
Mary Repairs Microwaves: A Mathematical Analysis of Revenue and Overhead Costs - Q&A

In our previous article, we analyzed Mary's revenue and overhead costs to determine after how many hours she will break even. We also performed a sensitivity analysis to analyze the impact of changes in her revenue and overhead costs on her break-even point. In this article, we will answer some frequently asked questions (FAQs) related to Mary's business.

Q: What is Mary's revenue function?

A: Mary's revenue function is $R(h) = 20h$ , where $h$ is the number of hours she spends repairing microwaves.

Q: What is Mary's overhead cost function?

A: Mary's overhead cost function is $O = 120$ , which means that her overhead costs are a fixed amount of $120, regardless of the number of hours she spends repairing microwaves.

Q: How many hours will Mary break even?

A: Mary will break even after 6 hours of repairing microwaves.

Q: What happens if Mary's revenue increases by 10%?

A: If Mary's revenue increases by 10%, she will break even after 5.45 hours of repairing microwaves.

Q: How can Mary increase her revenue and reduce her overhead costs?

A: Mary can increase her revenue and reduce her overhead costs by implementing the following strategies:

Increase demand for her services: Mary can increase demand for her services by marketing her services to a wider audience, offering discounts to new customers, and providing excellent customer service.
Reduce overhead costs: Mary can reduce her overhead costs by negotiating lower prices with her suppliers, reducing her energy consumption, and streamlining her operations.
Invest in new equipment: Mary can invest in new equipment that will enable her to repair microwaves more efficiently and effectively, reducing her overhead costs and increasing her revenue.

Q: What are the benefits of breaking even?

A: Breaking even means that Mary's revenue equals her overhead costs, which means that she is not making a profit, but she is also not losing money. This is a good starting point for Mary's business, as it allows her to cover her costs and potentially make a profit in the future.

Q: What are the challenges of breaking even?

A: Breaking even can be challenging for Mary's business, as it requires her to cover her overhead costs, which can be a significant expense. Additionally, breaking even may not be enough to cover Mary's living expenses, which can make it difficult for her to sustain her business.

In conclusion, Mary's revenue and overhead costs are modeled by the functions $R(h) = 20h$ and $O = 120$ , respectively. By analyzing these functions, we have determined that Mary will break even after 6 hours of repairing microwaves. We have also answered some frequently asked questions related to Mary's business, including how she can increase her revenue and reduce her overhead costs. By implementing these strategies, Mary can increase her revenue and reduce her overhead costs, ultimately leading to increased profitability and growth for her business.

Based on our analysis, we recommend that Mary consider the following strategies to increase her revenue and reduce her overhead costs:

Increase demand for her services: Mary can increase demand for her services by marketing her services to a wider audience, offering discounts to new customers, and providing excellent customer service.
Reduce overhead costs: Mary can reduce her overhead costs by negotiating lower prices with her suppliers, reducing her energy consumption, and streamlining her operations.
Invest in new equipment: Mary can invest in new equipment that will enable her to repair microwaves more efficiently and effectively, reducing her overhead costs and increasing her revenue.

By implementing these strategies, Mary can increase her revenue and reduce her overhead costs, ultimately leading to increased profitability and growth for her business.