A Lightbulb Company Is Interested in the Lifespan of Their

question 52

Short Answer

A lightbulb company is interested in the lifespan of their lightbulbs.They have 20,000 lightbulbs burning and have collected the following information.
After 2 months, 98% of the bulbs were still working.
After 8 months, 80% of the bulbs were still working.
We summarize all the data collected below: (Read carefully: the data was not collected at regular intervals.)
How many bulbs out of the original 20,000 burned out during the first 4 months?

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Definitions:

Aggregate Demand

The aggregate market demand for products and services within an economy, set against a specific price level over a determined period.

Government Budget

An itemized forecast of an entity's income and expenses over a specified future time period, utilized by governments to plan and control spending.

Government Borrowing

The process by which the government finances its expenditures by issuing debt, typically through the sale of securities like bonds.

Independent

Not being influenced or controlled by others; having the freedom to think, act, and make decisions by oneself.