Answer:
c. percentage change in price and percentage change in quantity demanded.
Explanation:
A price elasticity of demand can be defined as a measure of the responsiveness of the quantity of a product demanded with respect to a change in price of the product, all things being equal.
The price-elasticity of demand coefficient, Ed, is measured in terms of percentage change in price and percentage change in quantity demanded.
The demand for goods is said to be elastic, when the quantity of goods demanded by consumers with respect to change in price is very large. Thus, the more easily a consumer can switch to a substitute product in relation to change in price, the greater the elasticity of demand.
Generally, consumers would like to be buy a product as its price falls or become inexpensive.
For substitute products (goods), the price elasticity of demand is always positive because the demand of a product increases when the price of its close substitute (alternative) increases.
If the price elasticity of demand for a product equals 1, as its price rises the total revenue does not change because the demand is unit elastic.
 
        
             
        
        
        
Answer:
Option (b) is correct.
Explanation:
This is a case of monopoly market condition where there is a single firm operating the whole market. The price of the products is set by the single firm and the buyers in this market are price taker. The monopolist can earn normal profit, losses and abnormal profit in the short run and can earn normal profit and abnormal profit in the long run. 
In our case, the price of diamonds is high because there is only single firm in the whole market and there is no other competitors in the market. That's why they are charging the higher prices.
 
        
             
        
        
        
Answer:
1. Commercial banks 
2. Life insurance companies 
3.  Mutual funds 
Explanation:
commercial banks 
The commercial bank is a financial institution that accepts deposits and offer other services such as giving loans and other basic financial services to both individuals and organisations.  
Life insurance companies 
The life insurance companies are financial institutions that provide lump sums otherwise known as death benefits to beneficiaries  of their policy holders upon their demise, provided that premium is paid on regular basis. 
 Mutual fund 
A Mutual Fund is an investment vehicle made up of a pool of funds collected from numerous investors for the purpose of investing in securities such as stocks, bonds, money market instruments and similar assets. Mutual Funds are operated by professional fund managers, who invest the fund's capital and attempt to produce capital gains and income for the investors.  
One of the main advantages of Mutual Funds is they give small investors access to professionally managed, diversified portfolios of equities, bonds and other securities. Each shareholder, therefore, participates proportionally in the gain or loss of the fund.
 
        
             
        
        
        
Answer:
Q= 5714 pizzas
Explanation:
Giving the following information:
Your research shows that:
Pizza oven= $10,000. 
Making the pizza= $5.00 per pizza. 
To buy freshly made pizzas costs $6.75 each.
Q= (Fixed cost 1 - Fixed cost 2)/ (variable cost 2 - variable cost 1)
Q=(10000-0)/(6.75 - 5)
Q= 5714
 
        
             
        
        
        
B because to much of a increase could hurt the economy