Demand for salt is nearly perfectly inelastic. If the government imposes a tax of 10% on salt what shall be the effect on quantity demanded of salt? Why?

Economists in Champaign have been studying the local market for pizza. The market is described in the graph below:     What is the price elasticity of demand(in absolute value) when the price changes from $7 to $5?(Round your answer to include 2 decimal places.)

When the price of beef is $ 4 per kg, quantity demanded is 500 grams. but when the price changes to $3.92 then quantity demanded is 530 grams. calculate the price elassticity demand?

The figure below represents the market for Gasoline, where initially the equilibrium price was $5.60. The picture shows the effect of a $1.50 tax on gasoline. Using the information from the figure, what is the price elasticity of supply(Using the Midpoint method) when moving from equilibrium to the new supply after the tax?(round your answer to 2 decimal places)