What are three components of an effective reference?

Suppose you calculate that elasticity of demand for cigarettes is 0.5. you can conclude that: a. demand for cigarettes is elastic b. demand for cigarettes is unitary elastic c. a 1% increase in price of cigarettes will result in a 0.5% decrease in quantity demanded d. a 1% increase in the price of cigarettes will result in a 0.5% increase in quantity demanded.

What do you need to verify in a patient's profile? a. name, address, medication b. name, phone number, address, medication, dose, frequency, manufacturer c. name, medication, dose, strength, frequency d. name, history of illness, medication, dose, strength, frequency

How could natural selection best be used to explain the evolution of the white fur of arctic fox