Answer:
38.64 km^2
Explanation:
The formula for the area of a trapezoid is:
![((b_(1)+b_(2))*h)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/updjmtfnc3418ytc5nq47jdcse413a7cqx.png)
Where b1 and b2 are the bases and h is the height. We are given 2.9 and 10.9 as the bases and 5.6 as the height. We can plug these values into the formula:
![((2.9+10.9)*5.6)/(2)](https://img.qammunity.org/2022/formulas/mathematics/college/4kvn3uv5ebe8auv1aotpqrrk17jtbhorgj.png)
After entering the expression in the calculator, you get:
38.64 km^2
This is the first option.