Please help me One of the angles in a triangle measures 90 degrees. Name three possibilities for the measures of the remaining two angles.

Wrote and expression for the difference of p and 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?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog