Solve the Problem. -Radioactive Carbon-14 Has a Continuous Compound Rate of Decay of of Decay

question 9

Multiple Choice

Solve the problem.
-Radioactive carbon-14 has a continuous compound rate of decay of r = -0.000124.Estimate the age of a skull uncovered at an archaeological site if 6% of the original amount of carbon-14 is still present.(Compute answer to the nearest year.)

• A)22,689 yr
• B)470 yr
• C)124,027 yr
• D)20,032 yr

---

Definitions:

Immune System

The body's defense mechanism against infectious organisms and other invaders, comprising various cells, tissues, and organs that work together to protect the body.

Cortisol

A steroid hormone released by the adrenal glands in response to stress or low blood-glucose concentration; it plays a key role in the body's stress response and helps regulate metabolism, immune response, and blood pressure.

Infections

The invasion and multiplication of microorganisms such as bacteria, viruses, and parasites that are not normally present within the body.

Social Readjustment Rating Scale

A scale that measures the amount of stress in one's life over a certain period of time based on the occurrence of various life events, each given a different weight.