jvaldera01 jvaldera01 28-06-2017 Mathematics contestada Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the best expression to estimate the quotient using front-end estimation? A -21 ÷ 4 B -21 ÷ 5 C -20 ÷ 4 D -20 ÷ 5