### Home > CALC > Chapter 2 > Lesson 2.2.2 > Problem2-70

2-70.

Alter your sigma notation from problem 2-69 to estimate the area with $16$ rectangles and use it to approximate the area. Were the results the same?

$n$ represents number of rectangles.
$Δx$ represents width of each rectangle.
a represents starting value on the $x$-axis.