Which does not refer to aerobic exercise? A. Increased breathing and elevated heart rate over an extended period of time
B. Using large muscles
C. Swimming, biking, and running
D. Line sprints
QUICK WILL GIVE BRAINLIEST

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.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19