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.
Average Cost To Replace A Water Heater. The average water heater has a lifespan of 12 years. If you run into the decision of whether to repair or replace your water heater, a good guideline to follow is to never spend more than half the cost of replacing a water heater on the repair. The average cost to replace a water heater is $850, with most homeowners spending between $780 and $965.