The Function F $$f ( x ) = 800 ( 0.5 ) ^ { x / 60 }$$

question 91

Multiple Choice

The function f $$f ( x ) = 800 ( 0.5 ) ^ { x / 60 }$$ models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of
Radioactive material in the vault after 40 years. Round to the nearest whole number.

• A) 267 pounds
• B) 600 pounds
• C) 283 pounds
• D) 504 pounds

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Definitions:

Revoke

The act of officially canceling or withdrawing something, such as a law, right, or privilege.

Without Reserve

An auction term indicating that the item for sale will be sold to the highest bidder, regardless of the bid amount, with no minimum price set.

Auction

A public sale in which goods or property are sold to the highest bidder.

Revocation

The act of officially withdrawing, cancelling, or reversing a decision, offer, or statement.