Question

Urgent!!!!How do you do all four of these problems?

Answer 1

In each case, you can start by taking the antilog.

21. x = 4^(3/2)
  x = 8

22. 81 = x^(4/3)
  81^(3/4) = x = 27

24. 2x - 3 = 6^0
  2x = 4 . . . . . add 3
  x = 2

25. 5 - x = 16^(1/2)
  5 - 4 = x = 1


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You're using the relationship of logarithms:
$\log_a{b}=c\,\Longrightarrow\,b=a^{c}$