Posted by **Nancy** on Thursday, August 2, 2012 at 10:06am.

I don't understand this problem:

(1/2)n = 0.015625

n log 0.5 = log 0.015625

n = log 0.5 / log 0.015625

n = 6

When I plug log .5 into the calculator it gives .3010 and when I plug .15625 to the calculator it is -1.806 and that would be -.3010/-1.806 =.1666. How is the answer 6? Really, can you provide a detailed explanation? I am really confused.

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