Robin Clark Has a Cell Phone That She Uses Only

question 27

Short Answer

Robin Clark has a cell phone that she uses only for emergencies. The cost of the phone is $40 a month. The cellular company is offering unlimited nights and weekends for an additional $10 a month ($120 a year). Robin thinks it would be "cool" to have this benefit and after all $10 a month is not so much. Show Robin how much she will have in 20 years if she invests this $120 a year at 9% instead of accepting the unlimited nights and weekends offer.

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Definitions:

Placebo Treatment

A treatment that consists of a harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect.

Blood Pressure

The force exerted by circulating blood on the walls of blood vessels, considered vital for human life and an important indicator of health.

Experimental Group

In an experiment or clinical trial, the group of participants who receive an active treatment.

Physiological Changes

Alterations in the body's normal biological functions, which can result from disease, environmental factors, or normal aging processes.