A ball is Thrown straight up with a speed of 30 M/S, and air resistance is negligible what is its velocity after 4.2s

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

in physics zero. in muscle fatigue could be high

i think the answer is a and b

i wish you luck