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If a Radioactive Element Has a Half-Life of 10,000 Years,what

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If a radioactive element has a half-life of 10,000 years,what fraction of it is left in a rock after 40,000 years?


Definitions:

Simple Interest

Interest calculated on the principal amount of a loan or deposit without compounding.

Daily Closing Balance

The total amount in an account at the end of each day, taking into account all transactions and activities of that day.

Bank Account

A financial account maintained by a bank or other financial institution in which the financial transactions between a customer and the bank are recorded.

Discounted

A reduction applied to the price of goods, services, or securities, or the process of calculating the present value of a series of future cash flows.

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