Which question is statistical? how many pets does each of my friends have? how old is your grandmother's pet? how much does my mother's pet weigh? how many veterinarians are in my town?

What's the difference between: x≥0 and nonnegative integer. ?

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)