The margin of error decreases with an increased sample size and increases with an increase in confidence level.
        
             
        
        
        
Answer:
c
Step-by-step explanation:
 
        
             
        
        
        
Answer:
For ![\[20\]](https://tex.z-dn.net/?f=%5C%5B20%5C%5D) minutes Elena add water to correct the error.
 minutes Elena add water to correct the error.
Step-by-step explanation:
The capacity of the washing machine is ![\[20\]](https://tex.z-dn.net/?f=%5C%5B20%5C%5D) gallons.
 gallons.
She uses ![\[20\]](https://tex.z-dn.net/?f=%5C%5B20%5C%5D) gram soap for
 gram soap for ![\[10\]](https://tex.z-dn.net/?f=%5C%5B10%5C%5D) gallon of water
 gallon of water
Her son by mistake dissolved ![\[60\]](https://tex.z-dn.net/?f=%5C%5B60%5C%5D) grams of soap to
 grams of soap to ![\[10\]](https://tex.z-dn.net/?f=%5C%5B10%5C%5D) gallons of water.
 gallons of water.
![\[60\]-](https://tex.z-dn.net/?f=%5C%5B60%5C%5D-) gram soap is right for
gram soap is right for ![\[30\]](https://tex.z-dn.net/?f=%5C%5B30%5C%5D) gallons of water, thus
 gallons of water, thus ![\[20\]](https://tex.z-dn.net/?f=%5C%5B20%5C%5D) gallon of water must be added more.
 gallon of water must be added more.
She pore water ![\[2\]](https://tex.z-dn.net/?f=%5C%5B2%5C%5D) gallons per minute thus,
 gallons per minute thus, ![\[20\]](https://tex.z-dn.net/?f=%5C%5B20%5C%5D) gallons of water will take
 gallons of water will take![\[10\]](https://tex.z-dn.net/?f=%5C%5B10%5C%5D) minutes.
minutes.
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