(At the age of eighteen, all male citizens are required to-) register with Selective Service.-
(A citizen receives a summons from a US court to report for-). Jury service-
(The three most common types of taxes that citizens must pay are income, sales, and taxes.) Federal income, payroll, Social security and medicare and state income taxes.
Matthew sells tickets for a school lottery at 3$/each. He wants to know how much profits he will make according to the number of tickets sold knowing that he starts with 2$.
Answer:
They use a control group.
Hope this helps :)
