The Carbon-14 Activity of Some Ancient Indian Corn Was Found

question 111

Multiple Choice

The carbon-14 activity of some ancient Indian corn was found to be 7.0 disintegrations per minute (dpm) per gram of carbon. If present-day plant life has 16 dpm per gram of carbon, how old is the Indian corn? (t_1/2 = 5,730 yr)

• A) 6,800 yr
• B) 2,500 yr
• C) 4,700 yr
• D) 10,000 yr
• E) 7,200 yr

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Definitions:

CPI

A metric known as the Consumer Price Index evaluates the overall weighted pricing of a range of consumer items and services, covering areas such as healthcare, food, and transportation.

Raise

An increase in salary or wages.

Weakens

To become lesser in strength, value, or severity.

US$

The United States dollar, the official currency of the United States of America.