0 of 1 Save Answer the following questions about F(x)=9x+140. (A) Calculate the change in F(x) from x = 12 to x = 18. (B) Graph F'(x) and use geometric formulas to calculate the area between the graph of F'(x) and the x-axis from x=12 to x=18. (C) Verify that your answers from (A) and (B) are equal, as guaranteed by the fundamental theorem of calculus. (A) Calculate the change in F(x) from x = 12 to x = 18. The change is (Simplify your answer.)