What is earth revolution estimated time and direction
What is moon's revolution estimated time and direction

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Which lists the organs in the correct order as food passes from the mouth to anus?