Solve for θ\thetaθ: e4θ=15e^{4\theta} = 15e4θ=15.
θ=ln(15)−4\theta = \ln(15) - 4θ=ln(15)−4
θ=ln(15)4\theta = \frac{\ln(15)}{4}θ=4ln(15)
θ=4ln(15)\theta = 4\ln(15)θ=4ln(15)
θ=15e4\theta = \frac{15}{e^4}θ=e415