Choose all of the equations that are equivalent to 8k = 20 A. 8k - 4 = 20 + 4
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B. 8k + 4 = 20 + 4
C. 8k x 3 = 20 x 3
D. 8k + 10 = 20 + 10
E. 8k x 5 = 20 - 5

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?

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt

If np3 /nc2 = 6, find the value of n