Stacy owns a hair salon and haircuts are $10. she charges hairdressers $20 per hour to rent a chair and serve clients. what is the minimum number of haircuts a hairdresser should give per hour to earn money at stacy's salon?

d

explanation:

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.

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