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For each situation, define variables and what units they might have (no need to write formulas). State whether the quantity is changing in a linear or exponential fashion.

A savings account, which earns no interest, receives a deposit of $723 per month.

 


 

The value of a machine depreciates by 17% per year.



 

A liter of water evaporates from a swimming pool every day.



 

Every 124 minutes, 12 of a drug dosage remains in the body.

Guest Feb 14, 2018
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A savings account, which earns no interest, receives a deposit of $723 per month.

 

Linear......let  A be the amount accumulated in dollars and M  the number of months the deposit is made

 

 

 

The value of a machine depreciates by 17% per year.

 

Exponential.....let  V be the value in dollars  after  T  years

 

 

 

A liter of water evaporates from a swimming pool every day.

 

Linear......let A be the amount of water in liters remaining in the pool after D  days

 

 

I think the last is supposed to be  

 

Every 124 minutes, 1/2 of a drug dosage remains in the body.

 

Exponential.....this is a decay situation.....let   AO be the original amount (in cm^3)  and AT the amount remaining after T minutes  

 

 

cool cool cool

CPhill  Feb 14, 2018

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