SOLUTION: I have a problem from a sample asset test and I can't figure out where to look for similar problems in a textbook. The problem is: 5x10^n=0.005 then n=? A. -5 B. -3 C. -2 D.

Algebra ->  Algebra  -> Exponents -> SOLUTION: I have a problem from a sample asset test and I can't figure out where to look for similar problems in a textbook. The problem is: 5x10^n=0.005 then n=? A. -5 B. -3 C. -2 D.      Log On

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Question 50236: I have a problem from a sample asset test and I can't figure out where to look for similar problems in a textbook. The problem is:
5x10^n=0.005 then n=?
A. -5
B. -3
C. -2
D. 2
E. 3

Answer by stanbon(57967) About Me  (Show Source):
You can put this solution on YOUR website!
5x10^n=0.005 then n=?
A. -5
B. -3
C. -2
D. 2
E. 3
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If you start with 5.0 and end up with 0.005
you must have moved the decimal point 3 spaces
to the left.
Multiplying by 10^-3 will do this.
So the answer is "B" or -3
Cheers,
Stan H.