### Home > PC > Chapter 2 > Lesson 2.3.8 > Problem2-170

2-170.

Suppose you know that adding up $100$ left-endpoint rectangles for the function $f\left(x\right)$ over the interval $-2\le x\le6$ gives a value of $9$. What would you get if you added up $100$ left-endpoint rectangles of the function $g\left(x\right) = f\left(x\right) + 4$ over the same interval?

Use the width and height of the additional area to calculate.