### Home > APCALC > Chapter 1 > Lesson 1.4.1 > Problem1-145

1-145.

Cynthia began to draw midpoint rectangles to approximate the area under the curve for −2 ≤ x ≤ 4 given f(x) = $\frac { 1 } { 4 }$x3 $\frac { 1 } { 2 }$x2 x + 3. Trace Cynthia’s graph and finish drawing the remaining four midpoint rectangles. Then, compute the estimated area. Homework Help ✎

Make the remaining rectangles. Then calculate the areas of each rectangle and add them together to find A(f, −2 ≤ x ≤ 4).

The width of all of the rectangles is