heat loss of a glass window varies jointly as the window's area and the difference between the outsi

[math_celebrity]

heat loss of a glass window varies jointly as the window's area and the difference between the outside and the inside temperature. a window 6 feet wide by 3 feet long loses 1,320 btu per hour when the temperature outside is 22 degree colder than the temperature inside.

Find the heat loss through a glass window that is 3 feet wide by 5 feet long when the temperature outside is 9 degree cooler than the temperature inside.

Find k of the equation:
6*3*22*k = 1320
396k = 1,320
k = 3.33333 per our equation solver

Now, find the heat loss for a 3x5 window when the temperature is 9 degrees cooler than the temperature inside:
3*5*9*3.333333 = 450 btu per hour