The formula b=28a is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring.
A) determine the minimum furnace output for a 2200 ft squar modern house
B) Solve the formula for a
b = 28 * 2200
b = 61,600 BTU
a = b/28 = .0357 b
0.0357
A) To determine the minimum furnace output for a 2200 square foot modern house, we can use the formula b = 28a, where a represents the square footage of the house's flooring.
Substituting a = 2200 into the formula, we have:
b = 28 * 2200
To calculate this, multiply 28 by 2200:
b = 61,600 BTUs
Therefore, the minimum furnace output for a 2200 square foot modern house is 61,600 BTUs.
B) To solve the formula b = 28a for a, we need to isolate the variable a.
Start with the formula:
b = 28a
Divide both sides of the equation by 28:
b/28 = a
Therefore, the formula b = 28a can be solved for a as a = b/28.