A) 11.5 km
B) 9.5 km
C) 9 km
D) 9.7 km

Answer:
C) 9 km
Step-by-step explanation:
Area of parallelogram = 84.6 km²
base * height = 84.6
9.4 * height = 84.6
[tex]height=\frac{84.6}{9.4}\\\\=9 km[/tex]