Acoin is flipped 70 times and lands on tails 21 times. what is the relative frequency of the coin landing on tails?

30%
50%
60%
70%

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(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?