If benjamin skated 80 kilometers at 10 kilometers per hour how long was benjamin skating

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Can you divide 25 into 4 equal groups? explain why or why not.

Whoever gets this right gets the ! the half life of a soul smelling substance is 4 years. if you have 8 oz of this strange substance, how much of it will you have after 20 years? show work.