Question 123966
Assume you mean:
:
2.8 = -{{{log(3.5/Q)}}} and you want to find Q
:
Multiply the equation by -1 to put the negative on the left
-2.8 = {{{log(3.5/Q)}}}
:
Find the anti-log of both sides; {{{(10^x)}}}of -2.8 = .001585
:
.001585 = {{{3.5/Q}}}
:
Multiply both sides by Q
.001585*Q = -3.5
:
Q = {{{3.5/.001585}}}
:
Q = 2208.2
:
:
Check on a good calc: enter: log(3.5/2208.2) = -2.79997 ~ -2.8
:
It may be that the tutors weren't quite sure how it meant to be.