Why does the maximum packet lifetime, T, have to be large enough to ensure that not only the packet but also its acknowledgements have vanished

Which of the following statements tests if students have a grade of 70 or above, as well as fewer than five absences? a: if(grade > = 70 and daysabsent < = 5): b: if(grade > = 70 or daysabsent < = 5): c: if(grade > 70 and daysabsent < = 5): d: if(grade > 70 or daysabsent < = 5): i took the test the answer is a

What provides an array of buttons for quick access to commonly used commands and tools

Has anyone seen my grandma shes been gone for 4 years already