Arectangle picture frame has a width of 9cm and a length of x cm .which expression represents the perimeter of the picture frame? 2(x+18)2x+92x+18x +9

The diameter of a bacteria colony that doubles every hour is represented by the graph below. what is the diameter of the bacteria after 8 hours? graph of a curve passing through the points zero comma 1, one comma two, two comma four, and three comma eight