Mark dug a 20 foot hole in 4 hours. Which rational number shows the average depth Mark dug each hour? Check all that apply.
(A) –5
(B) [tex]\frac{-20}{4}[/tex]
(C) −[tex]\frac{4}{20}[/tex]
(D) −[tex]\frac{20}{4}[/tex]
(E) [tex]\frac{-4}{20}[/tex]
(F) [tex]\frac{-20}{-4}[/tex]
