posted by Avery .
The formula b=29a is used to estimate the minimum furnance output B in btus for a modern house with the amount of square feet of flooring A
1. determine the minimum furnance output for a 2300 ft2 modern house
2. solve the formula A
Math problem -
1. B = 29 * 2300 = 66,700 BTUs.
2. B = 29A,
A = B/29.