What's the code for 3.4.4 in karel go down the slide: part 2? Did I do something wrong? PLEASE HELPP!!!

Which is a benefit of peer-to-peer networking? easy to add or remove devices main server has a fast processor more reliable than a client/server network same software versions on all computers

To hide gridline when you display or print a worksheet

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.