how to find inverse?

gcf101
Tue, 24 Jun 2008 11:19:48 +0000

Both questions are beyond the SAT Reasoning test scope - they belong to the SAT Subject Math test.
log(z)-log(4) = log(z/4), so
log(z/4) = 2
10^log(z/4) = 10^2
z/4 = 100
z = 400