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Answer:
The exact charge per cubic foot of water usage is 4 Cents.
Step-by-step explanation:
Let the per cubic foot charge be $ 'x' and the fixed charge be $ 'y'.
A household using 1100 cubic feet was billed $ 114.
Therefore, we get the equation,
.......( A )
And other household 1500 cubic feet was billed $ 130.
Therefore, we get the equation,
......( B ).
Now, we subtract equation A from equation B.
.....( B )
......( A )
__________________
So, we get,
.
Therefore,
Cents.
So, the exact charge per cubic foot is 4 Cents.