.What how many minutes before the game MUST the ref be there and what are 3 pregame responsibilities?

What is the function of the retina?

Which two levels of the spine that can undergo flexion and extension?

Protein provides 4 calories per gram. mary is on a diet that requires her to eat atleast 40 grams of protein each day. shes eaten 152 calories of protein today. how much more protein does mary need to eat to meet her goal?