Which equations can be used to determine the area of the irregular figure? Check all that apply.

A trapezoid has a base of 9 inches, height of 5 inches, and top side length of 3 inches.
A = 3 (5) + one-half (5) (6)
A = one-half (5) (9) + one-half (3) (5)
A = one-half (3) (5) (9)
A = 3 (5) (9)
A = one-half (5) (9) + 3 (5)
A = 3 (5) + 6 (5)

The problem above may be solved through the concept of conservation of momentum such that, 
                                      m₁v₁ = m₂v₂
Substituting the given from the problem above,
                                  (0.145 kg)(20 m/s) = (0.145 kg + 120 kg)(v₂)
                                     v₂ = 0.024 m/s
Therefore, the answer is 0.024 m/s.