Approximate the Area Under the Curve and Above The $x$ -Axis Using

Multiple Choice

Approximate the area under the curve and above the $x$ -axis using $n$ rectangles. Let the height of each rectangle be given by the value of the function at the right side of the rectangle.
- $f(x) =3 x^{2}-2$ from $x=1$ to $x=5 ; n=4$

A) 144
B) 140
C) 154
D) 150