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avatar+479 

The function ​f(x)​ is the cost of renting a boat where x represents the number of hours rented not to exceed 12 hours. Any portion of an hour is rounded up to the next whole hour.

What is the practical domain for the function f(x)?

Choices

{1,  2, 3, 4,5, 6, 7, 8, 9, 10, 11, 12}

all real numbers

[0,12]

​[0,24] ​

 Dec 20, 2018
 #1
avatar+17331 
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Deleted......see cphil's answer below

 Dec 20, 2018
edited by ElectricPavlov  Dec 20, 2018
 #2
avatar+98130 
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Note that any portion of  an hour is rounded up.....and we cannot exceed 12 hours

 

So.....we will only have positive whole numbers in the domain.....and the greatest will be 12

 

So.....the first answer is  correct

 

Note that if we rent the boat for 3.5 hours....it puts 4 in the  domain...etc.....

 

[ This is known as a "step" function ]

 

 

cool cool cool

 Dec 20, 2018

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