I believe that the answer is A- 8600-5300
Hope this helps!
Compute the derivative of 
at 
- this will be the tangent vector - then normalize it by dividing it by its magnitude to get the unit tangent vector 
.
Area of the full circle = π (13)² = 169π
Area of the sector = 80/360 x 169π = 118 ft²
Answer: 118 ft² (Answer D)
Volume of cuboid=lenght*breadth*height
=3ft*3ft*5ft
=45ft^3
This is what a 45 degree angle looks like.
Good luck!
