To determine customer opinion of their food qualityfood quality, General FoodsGeneral Foods randomly selects 130130 city blockscity blocks during a certain week and surveys all homes within the city blockshomes within the city blocks. Which type of sampling is used?

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So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho