TIMED TEST WILL GIVE BRAINLIEST PLEASE Sunny has $4.80 in quarters and dimes. The number of dimes she has is 4 more than 3 times the number of quarters. Which system of equations represents this scenario?
A: 0.01x + 0.25y = 4.80
y = 3x + 4

B: 0.01x + 0.25y = 4.80
x = 3y + 4

C: 0.1 + 025y = 4.80
y = 3x + 4

D: 0.1 + 0.25y = 4.80
x = 3y + 4

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?