SOLUTION: solve for x. zero point six ^ negative x equals four thanks>> my # keys arent working!!!

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Question 23985: solve for x.

zero point six ^ negative x equals four
thanks>> my # keys arent working!!!
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
(0.6)^-x = 4

Take logs:
-xlog(0.6) = log4
xlog(0.6) = -log4
x = -log4/log(0.6)
x = 2.7138 to 5sf.

jon.