Answer
$\approx 7.094570$
Work Step by Step
$y = \ln{1+x^{3}}$ then $y = \frac{1}{1+x^{3}} 3x^{2}$
$L = \int^{5}_{0} f(x) dx$ where $f(x) = \sqrt{1+9x^{4}/(1+x^{3})^{2}}$
Since $n = 10, \Delta x = \frac{5-0}{10} = \frac{1}{2}$
$L \approx S_{10} = \frac{1/2}{3}[f(0) + 4f(0.5) + 2f(1) + 4f(1.5) + 2f(2) + 4f(2.5) + 2f(3) + 4f(3.5) + 2f(4) + 4f(4.5) + f(5)] \approx 7.094570$
