The model of monopolistic competition characterizes the market for plumbing services in a city. this market is initially in long-run equilibrium, but then there is an increase in the market demand for plumbing services. in the long run, the economic profits of typical firms in the industry will be:

There will zero economic profits in the long run.

Explanation:

Monopolistic competition is a market structure where there is a large number of firms producing differentiated products. There is very low or no restriction on the entry and exit of firms in the market.  

The market for plumbing services in a city is a monopolistic competition. An increase in the market demand will cause the price to increase. This will cause an increase in the profits of the existing firms.  

In the long run, new firms will enter the market, increasing the market supply. This will cause the price level to decrease till all the firms are having zero economic profits.

you will have $2593.74 in 10 years if you set aside $1,000 at 10%

you will have $9321.91 in 20 years if you set aside $2000 at 8%

you will have $1469.32 in 5 years if you set aside $1000 at 8%

you will have $1296.87 in 10 years if you set aside $500 at 10%

you will have $239.66 in 15 years if you set aside $100 at 6%

you will have $4660.96 in 20 years if you set aside $1000 at 8%

answer; by looking at total product,marginal product,and changes in both after changes in inputs