How did persia govern its empire? under which king?

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

31/3: which equation has the solutions x =?

The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.