21. Which problem-solving approach requires defining the scope of a system, dividing it into its components, and then identifying and evaluating its problems, opportunities, constraints, and needs?

hard

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

ya

320ft

step-by-step explanation:

120 divided by 3 equals 40

40 times 4=160

160 times 2=320