If a puppy gains eight pounds between veterinarian checkups, what has it gained?

the puppy gained mass only.
the puppy gained weight only.
the puppy gained mass and weight.
the puppy gained neither mass or weight.

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.