5. On a particular day in the 3rd Century BC, Eratosthenes knew that a well in Syene held no shadow whereas at the same time, a well in
Alexandria did. Draw shadows for identical flagpoles on three
different sized planets, if they exist. Notice that the difference in angles
is the same, but the distance between flagpoles is very different.

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.