antonio has already jarred 15 litters of jam and will jar an additional 1 liter of jam every day. how many days does antonio need to spend making jam if he wants to jar 18 liters of jam in all ?

Me with this one question, and i'll upvote the brainliest answer

Joanie watched 1 out of three of a movie in the morning

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?