Mary owes $3,800 on her credit card. she sends the credit card company a check for $800 with the notation "payment in full" on the check. if the credit card issuer cashes the check:

By 2020, automobile market analysts expect that the demand for electric autos will increase as buyers become more familiar with the technology. however, the costs of producing electric autos may increase because of higher costs for inputs (e. g., rare earth elements), or they may decrease as the manufacturers learn better assembly methods (i. e., learning by doing). what is the expected impact of these changes on the equilibrium price and quantity for electric autos?