Tina and her puppy are tugging on a rope, each pulling on opposite ends. When is Tina doing work?
O the entire time she plays with the puppy
o whenever she pulls the puppy toward her
O when she holds the rope steady as the puppy pulls it
O when she lets go of the rope and the puppy pulls it away

C. When she holds the rope steady as the puppy pulls it

Explanation:

because she is having to stay still as the force on the other end is pulling away, this is causing her body to work

a

explanation:

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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.