212121Is a Rational Number

question 307

True/False

.212121...is a rational number.Please explain why this is true or false.

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Definitions:

Costs

The amount of money required to purchase goods or services, or the expenses associated with manufacturing a product or providing a service.

Internal Failure Costs

Costs incurred to remedy defects found before the delivery of a product to the customer, such as waste, scrap, and rework.

Activity Costs

Expenses directly associated with specific activities, such as manufacturing, marketing, or research and development.

External Failure Cost

Costs incurred when a product fails to meet quality standards after it has been delivered to the customer, including warranty claims and returns.