John sells pizzas for $10 each and earns $2 profit per pizza. he pays workers $8 per hour. what is the minimum number of pizzas a worker should produce per hour to be beneficial to john?

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.