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.
When your water heater begins to leak, you have to replace it fast. We'll show you how to install your own gas water heater in less than a day. Even if you don't need a new water heater right now, chances are you will within the next few years. Water heaters tend to last seven to 15 years.ost residential water heaters cost $150 to $400 for either gas or electric, plus $200 to $450 if you have a plumber install it. More expensive gas water heaters with special venting systems also are available. But they're more difficult to install, and we won't deal with them here.