What is the scalar magnitude b, of the projection of b = -5ay + 4a, - 3a, along the vector a = 3ax + 4ay + 5a, direction? what is the vector projection ba along the vector a = 3ax + 4ay + 5a, direction?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents