Answer and Explanation:
An increase in the number of firms increases the demand elasticity. As the demand elasticity increases from 2 to 3 it means you could encounter less demand if product prices are increased. At a demand elasticity of -3, it is regarded as inelastic demand and a change in price will not affect the demand for the product as customers are still likely to patronize the product example gasoline. Due to its high demand, an increase in price will not readily affect the demand for it. Therefore if you are to change the price from $10 at 2 to 3 demand elasticity increase, the percentage of increase from 2 to 3 is given as.
3-2/2 X 100 = 50%
The new charge (x) at -3 demand elasticity = 50%/3 = 0.66666666
The increase in the new charge is therefore $10 + $10x = $10 + $10(0.166666) = $11.67