Which is greater 2 miles or 3 kilometers

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

The graph represents f(x)=[x]+3. what is f(-2.2)?

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