Using aerial photography, the widths of an area burned by a forest fire were measured at 0.5-mi intervals, as shown in the following table.
distance (mi)
0
0.5
1
1.5
2
2.5
3
3.5
4
Width (mi)
0.6
2.3
4.6
3.3
3.7
1.4
2.1
1.6
0.9
Determine the area burned by the fire by using the trapezoidal rule.
The area burned is approximately
nothing
(Type an integer or decimal rounded to one decimal place as needed.)