In March 2015, Laclede Gas had the following rate schedule for natural gas usage in single-family residences.Monthly service charge $19.50Delivery chargeFirst 30 therms $0.91686/thermOver 30 therms $0Natural gas costFirst 30 therms $0.348/thermOver 30 therms $0.5922/therm(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).
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
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Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
In March 2015, Laclede Gas had the following rate schedule for natural gas usage in single-family residences.
Monthly service charge $19.50
Delivery charge
First 30 therms $0.91686/therm
Over 30 therms $0
Natural gas cost
First 30 therms $0.348/therm
Over 30 therms $0.5922/therm
(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).
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