### Home > PC3 > Chapter 8 > Lesson 8.3.1 > Problem 8-91

8-91.

Approximate *A*

Determine the width of each rectangle.

Write an equation for the *x _{n}*s.

*x*_{0} = 1, *x*_{1} = 1.5, ...

Use sigma notation to show the sum of the areas of the 8 rectangles.