Which error occurs when you type in a cell reference that doesn't exist? round   #div/0! count #ref 

The first screen you see when you open word2016 what is called?

Where can page numbers appear? check all that apply. in the header inside tables in the footer at the bottom of columns at the top of columns

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.