Final answer:
The Hogan's used approximately 51.5 therms of natural gas in September, calculated by dividing the total natural gas bill of $19.57 by the cost per therm of $0.38.
Step-by-step explanation:
The student has asked to calculate the number of therms of natural gas used given the cost per therm and the total amount paid for the natural gas. Since a therm is a unit of heat most commonly referenced in utility bills in the United States, the subject of the question is Mathematics, as it involves a calculation based on given data. To determine the number of therms used when the cost is $0.38 per therm and the total bill is $19.57, we will use the formula:
- Begin by understanding the formula for the total cost of therms used: Total Cost = Number of Therms × Cost per Therm.
- Next, rearrange the formula to solve for the number of therms: Number of Therms = Total Cost / Cost per Therm.
- Finally, insert the known values into the formula: Number of Therms = $19.57 / $0.38.
After calculations, we find that:
Number of Therms = 51.5
Therefore, the Hogan's used approximately 51.5 therms of natural gas in September.