Amedical researcher has two petri dishes containing viruses. dish a has a population density of 1.2 viruses per square millimeter. dish a has an area of about 2,826 square millimeters. if both petri dishes have the same population density, approximately how many viruses are in dish a?
the full collection is 40 cd's. 5 of them are the gifts.
40 - 5 = 35 are not gifts.
if he has no friends he cant give them out to his friends
no friends = cant give anything out
length of runway = 1.2 km
see attached picture for solution: