Chapter 6.4, Problem 91E

Use Table 1 to evaluate all integrals involved in any solutions of Problems 71–94.

91. Learning. A person Iearns N iterns at a rate given approximately by

$\begin{array}{cc}{N}^{\prime }\left(t\right)=\frac{60}{\sqrt{t^2+25}}& t\ge 0\end{array}$

where t is the number of hours of continuous study. Determine the total number of items learned in the first 12 hours of continuous study.