Cost of Natural Gas In March 2014, Laclede Gas had the rate schedule (top, right) for natural gas usage in single-family residences.
(a) What is the charge for using 20 therms in a month?
(b) What is the charge for using 150 therms in a month?
(c) Develop a function that models the monthly charge C for x therms of gas.
(d) Graph the function found in part (c).
Monthly service charge $19.50
Delivery charge
First 30 therms $0.91686/therm
Over 30 therms $0
Natural gas cost
First 30 therms $0.3313/therm
Over 30 therms $0.5757/therm
Monthly service charge Delivery charge First 30 therms Over 30 therms Natural gas cost First 30 therms Over 30 therms | $19.50 $0.91686/therm $0 $0.3313/therm $0.5757/therm |
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