1 For this type of function, the domain is all real numbers.  A function with a fraction with a variable in the denominator. To find the domain of this type of function, set the bottom equal to zero and exclude the x value you find when you solve the equation.
Showering to Savings. In an average home, showers are typically the third largest water use after toilets and clothes washers. The average American shower uses 17.2 gallons (65.1 liters) and lasts for 8.2 minutes at average flow rate of 2.1 gallons per minute (gpm) (7.9 lpm). Shower Water Saving Tips Pay attention to the length of time spent in the shower.
The university gave away an initial batch of 5,000 low water flow showerheads to faculty, staff, and off-campus students. The chrome Earth Massage showerheads use 1.5 gallons per minute and will each save an estimated 7,300 gallons of water annually.