Question

Solve and check. 2^3x = 15

Answer 1

ln 2^3x = ln15
(3x) ln 2 = ln 15
3x= (ln 15)/( ln 2)
x = 1.30

Answer 2

\[3x=\frac{\ln(15)}{\ln(2)}\] by the change of base formula
then
\[x=\frac{\ln(15)}{3\ln(2)}\] then a calculator

Answer 3

Is 2^3x = 15 meant to be (2^3) x = 15 OR 2^ (3x) = 15?

Answer 4

i get 1.3 rounded, not 1.5