The Missouri American Water Company charges residents of St. Louis County $6.15 per month plus $2.0337 per thousand gallons used.*
(a) Find the monthly bill when 3000 gallons of water are used. What is the bill when no water is used?
(b) Write a linear equation that gives the monthly bill y when x thousand gallons are used.
(c) If the monthly bill is $22.42, how much water was used?
*Residential rates for a 5/8 inch meter in March 2006, assuming monthly billing and maximum usage of 16,000 gallons.
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