Among the variations on the graphs of the trigonometric functions are shifts--both horizontal and vertical. Such shifts are easily accounted for in the formula of a given function. Take function f, where f (x) = sin(x) .
The running costs vary from gas to electric. The average running cost for an electric water heater is $550. The average running costs of a gas water heater is $400. The difference in usage price per year is $150.
1 An electric water heater can cost $400-$3,000 or more for complete installation of a conventional storage-tank model and $1,800-$4,500 or more for a tankless model (including a 220V/240V outlet). 2  Electric water heaters typically cost less than gas units but are more expensive to operate.eerings Plumbing RIP OFF $1900 dollars to install a 40 gallon water heater which probably only cost $300-$400 dollars at Lowes. Took them 2.5 hours and a half an hour to 45 min the guys waited for parts.