*  Reading Outline, Sec5.2 *
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* Vocabulary/Definitions *
 - Definition/meaning of delta t
 - Sigma notation: meaning of [Sigma]_{i=1}^{n} f(t_i) delta t
 - Definite integral
 - Riemann sum
 - Integrand
 - Limits of integration
 - Definite integrals and areas
 - General Riemann sum

* Understand *
1. Estimate [int]_1^3 ln(x) dx using a left-hand sum with n=4.


2. Consider [int]_0^2 3x dx as an area and use that interpretation to
find the value of the integral.