Estimate the area under the graph of $\displaystyle {f{{\left({x}\right)}}}=\frac{{1}}{{{x}+{4}}}$ over the interval $\displaystyle {\left[{2},{4}\right]}$ using four approximating rectangles and right endpoints.

$\displaystyle {R}_{{n}}=$ Preview Question 6 Part 1 of 2  

Repeat the approximation using left endpoints.

$\displaystyle {L}_{{n}}=$ Preview Question 6 Part 2 of 2  

Round answers to 4 places. Remember not to round too early in your calculations.