Yes, the price of used hot tubs have gone down greatly. Although you could expect this with any product. Used hot tubs cost around $100-$200.
No, an amount cannot be decreased by more than 100 percent. To decrease by more than 100 percent would mean that the amount is actually going into the negative values, which is not possible in most contexts. A decrease of 100 percent means that the amount is reduced to zero.
DC motors are generally more efficient than AC motors. DC motors have a lower amount of inertial associated with them, making them more efficient to run.
As time goes by we get better at making things smaller, think of how the size of a computer has decreased and become more efficient.
a: sanitation and medical care improved b: consumers wanted imported goods. c: technology made manufacturing more efficient
Using a more efficient washer and dryer along with an energy efficient dishwasher will save a good amount of money as well as changing to energy efficient bulbs.
The McCormick Reaper affected the economy by allowing farmer to have large, and more efficient harvests. This in turn decreased prices and increased goods.
no, because their is now more money than their was before so it is more efficient.
Shipping costs were decreased by use of containers. The decreased handling made container shipping more efficient and less expensive. However, small shipments increased in cost and these were required to be combined using "LCL", less than carload, handling.
Spiciness is increased by adding more spices to the food. Spiciness cannot be decreased except by increasing the amount of the food without increasing the amount of spices.
More efficient and most efficient are the comparative and superlative forms of "efficient".
Milk doesn't cause diseases, and milking machines just make it easier to milk more than one cow in a shorter space of time. No idea what you meant by "decreased amount of diseases caused by milk."
Economists say that competitive markets are efficient because when there is competition prices are lower. The more available an item, the less it will cost the consumer.