I need help with 3 and 5 if anybody can help I’ll be so gratefull thank u !! :))

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

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.