There is actually no one ☝
The soultion for the set is the second one
The cost of meal = 
The tip to the waiter =
%
Discount =
%
Cost = 
Cost = 
Cost = $
0
All of those numbers are rational, except the square root of 12.
<h2>
Hello!</h2>
The answer is:
The correct option is:
A. $0.49
<h2>
Why?</h2>
From the statement, we know that the iHome is used on average three hours a day, and we are asked to find the cost for a week, so first, we need to calculate the total hours that the iHome is used for, and then, calculate the kilowatt-hour consumption rate.


Now, we must remember that:

So,

Then, calculating the cost, we have:

Hence, we have that the correct option is:
A. $0.49
Have a nice day!