I searched up it said 1,295,996,310
BDC is adjacent (Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.)
Perimeter of Rectangle: 2W + 2L
One L is the river so we have 3 sides
420m/3 = 140m
Area of Rectangle is WL
140×140= 19,600 Sq meters
I'm assuming you may have another mathematical system the teacher wants you to use. Yet, I get Area is 19,600 Sq meters
Answer:
R = 9% per year
Step-by-step explanation:
The correct answer is 15.75