Supporters of prohibition, such as preacher billy sunday, expected that prohibition would encourage people to become religious. increase the violent crime rate. fix the problems of society. put liquor distillers out of business

Supporters of the Prohibition, such as the preacher Billy Sunday, expected that the Prohibition would encourage people to become religious, decrease the violent crime rate, fix the problems of society, and put the liquor distillers out of business. Widespread religious fervor and religious revival were central features of the Prohibition era. Preachers announced that the millennium was coming soon and, as a result, people stopped drinking hard spirits and attempted to live a life of perfection. This in turn, decreased the violent crime rate and attempted to fix the problems of society. 

Use the formula: (n-2)×180, where n is the number of sides(18-2)×180= 28800, now this is the full exterior angle of 18-gon so you divide it by 18.28800÷18=160