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

2-70.

*n* represents number of rectangles.

Δ*x* represents width of each rectangle.*a* represents starting value on the *x*-axis.

2-70.

*n* represents number of rectangles.

Δ*x* represents width of each rectangle.*a* represents starting value on the *x*-axis.