The correct answer is B. If you drop the parenthesis and collect like terms you get 8-3i.
First, set the equation in exponential form.
x=logbY to b^x=Y
x=log44. so x=x, b=10, Y=44
10^x=44
I know that 10^1=10, 10^2=100, and 10^1.5=31.6 so x should be between 1.5 and 2.
The answer is x=1.64.
42in.^2 should be the answer that you are looking for. Hope this helps
25% 6 divided by 24 will give you the percentage of copper in the bar