The length and width of a standard sheet of paper is measured, then the area is found by calculation to be 93.50 inches squared. The number of significant figures in the width measurement
must be at least what?

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.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more