urgent urgent algebra
posted by zachary .
rewrite each in exponential expression as a logarithmic expression
I am assuming you mean log _10 x = 4 in the equation.
For this, log _x y = z, x^z = y
So, x = 10^4 = 10,000 (a)
(b) log _x 5 = 2, x^2 = 5, x = sqrt 5
(c) i guess you meant log 10_ 8 = x so 10^x = 8
plug this into calculator, "log 8" to get 0.903089987 etc...