Answer:
it would take 40 minutes to wash all 20 cars
Explanation:
i think this is write but i don't understand the question 100%
Preexisting norms and patterns of behavior.
properly approach is best behavior
The answer is: A. Tobacco cultivation
Since this happen prior to industrial revolution, production for almost all products is being done with large number of manual labors. Tobacco was a very hot commodity at a the time since the health risk was still unknown. Slaves would provide large amount of manual labors with very cheap price for the plantation owners.
With repeated use of most psychoactive drugs, the immediate pleasant effect become less strongly pleasant and the unpleasant aftereffects become more strongly unpleasant.
A psychoactive drug, also known as a psychotropic drug, is a chemical substance that alters nervous system functions, resulting in changes in perception, mood, consciousness, cognition, or behavior. These substances can be used for medical, recreational, or spiritual purposes; to improve performance or alter consciousness; as entheogens for ritual, spiritual, or shamanic purposes; or for research. Physicians and other healthcare practitioners prescribe certain types of psychoactive drugs that have therapeutic value.
Psychoactive drugs or substances frequently cause subjective changes in consciousness and mood that the user may find rewarding, pleasant, or beneficial in an objectively observable or measurable way (e.g. increased alertness). Substances that are rewarding and thus positively reinforcing have the potential to induce addiction - compulsive drug use in the face of negative consequences.
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The above scenario is an example of "operant conditioning".
Operant conditioning can be characterized as a type of learning in which practices are subject to, or controlled by its prizes and outcomes. The investigation of operant conditioning comprehends relations between a conduct and the result it offers.
