If the price elasticity of demand for a product is equal to 0.5, then a 10 percent decrease in price will increase quantity demanded by:

5%

Explanation:

Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.

Price elasticity of demand = percentage change in quantity demanded / percentage change in price

0.5 = percentage change in quantity demanded /10%

percentage change in quantity demanded  = 10% X 0.5 = 5%

If the absolute value of price elasticity is greater than one, it means demand is elastic. Elastic demand means that quantity demanded is sensitive to price changes.  

Demand is inelastic if a small change in price has little or no effect on quantity demanded. The absolute value of elasticity would be less than one

Demand is unit elastic if a small change in price has an equal and proportionate effect on quantity demanded

the answer is d) it provided irrigation for farming.

answer; /// the use of a bank credit card to make purchase;