What is the velocity of sound at 40 degrees celsius?

Correct me, if I'm wrong just check the picture^•^

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.

e) none of the above answers are correct