What is the job of the small openings on the underside of leaves

Why do interests rates on loans to be lower in a weak economy than in a strong one

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

Average acceleration: i have no idea how to do this.