Used to describe if fossil use older or younger than another fossil

By refraining from constructing a building until they are certain that it will not cause harm to the environment, an organization is adhering to the

Design a pos circuit that displays the letters a through j on a seven-segment indicator. the circuit has four inputs w, x, y, and z which represent the last 4 bits of the uppercase ascii code for the letter to be displayed. thus, if wxyz = 0001 then "a" will be displayed. (any answer with 22 or fewer gates and inverters, not counting any for the inputs, is acceptable)

What characteristic of long period comets suggest they come directly from the oort cloud?