For the △ACD is shown below, select all the true statements. Lengths are rounded to the nearest tenth.

∠ADB = 30°
△ABD ∼ △ACD
CD = 33.7 centimeters
BD = 37.2 centimeters

How do you solve a question like this?

What is not true about kl and mn? what is mn? (show )

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?