When did games begin to really take off? A: when people began to live with formal laws

B: when people began to compete for limited resources

C: when people began to settle together in stable, organized communities

D: when people began to hunt nomadic animals, like buffalo

Which software would you use to create a print design? a. illustrator b. audacity c. reaper d. dreamweaver

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.

For positive constants a and b, the force between two atoms in a molecule is given f(r) = −a r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.