Answer:
- as written, x = 2
- as interpreted, x = -1
Step-by-step explanation:
To solve the problem as written, subtract 4, then take the logarithm base 2.
4 = 2^x
2^2 = 2^x
2 = x . . . . . . logarithm base 2
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Because this is not an answer choice, we suspect your problem is really ...
8 = 2^(x+4) . . . . . . parentheses are required
2^3 = 2^(x+4) . . . . show 8 as a power of 2
3 = x+4 . . . . . . . . . take the log to the base 2 (equate exponents)
-1 = x . . . . . . . . . . . subtract 4
