Final answer:
The minimum furnace output for a 1600 square feet modern house, using the formula B = 30a, is 48,000 BTUs, making option A the correct answer.
Step-by-step explanation:
The correct answer is option A, which is 48,000 BTUs. To determine the minimum furnace output for a house, you can use the formula B = 30a, where B is the furnace output in BTUs, and a is the square feet of flooring. For a modern house with 1600 square feet of flooring, the calculation would be:
- Replace a with 1600 in the formula: B = 30 times 1600.
- Multiply 30 by 1600, which results in 48,000.
Therefore, the minimum furnace output for a 1600-ft² modern house is 48,000 BTUs.
To determine the minimum furnace output for a 1600-ft² modern house, we can use the formula B = 30a, where B represents the furnace output in BTUs and a represents the amount of square feet of the house.
Substituting the given value of a (1600-ft²) into the formula, we get B = 30 * 1600 = 48,000 BTUs.
Therefore, the minimum furnace output for a 1600-ft² modern house is 48,000 BTUs.