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A utility company has the following rate schedule for natural gas usage in a city's district: Monthly service charge of $8.80; Per therm service charge: 1st 25 therms: $0.6686/therm; Over 25 therms: $0.85870
(a) What is the charge for usaging 25 therms in one month?
(b) What is the charge for using 45 therms in one month?
(c) Construct a fraction that gives the monthly charge c for x therms of gas.
9 years ago

Answers

Steve
well, for x <= 25,

f(x) = 8.80 + 0.6686x

Now what about for x > 25?
9 years ago

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