Gena wants to estimate the quotient of -21.87 divided by 4.79. Which expression shows the estimate using front-end estimation?
O-21-4
0-21-5
O-20-4
O-20-5

0.6

39mph

step-by-step explanation:

answer: options

step-by-step explanation:

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

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