Homework Help: Algebra II

Posted by Greg B. on Tuesday, June 12, 2012 at 3:33pm.

Solve 4^(x+2)= 160

How would I round this answer to the nearest hundredth?

My answer was 200, I don't believe I worked the problem out correctly.

Algebra II - Steve, Wednesday, June 13, 2012 at 10:26am
4^(x+2)=160
(x+2)ln4 = ln160
x+2 = ln160/ln4
x = ln160/ln4 - 2
= 1.66

Did you think to check whether 4^202 = 160? I mean, 4^4 = 256!

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