A car moved 80 km to the south. What is its displacement?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

What is the coefficient of kinetic friction μk between the block and the tabletop?

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).