Johnny buys a desk on sale for $300.00. If the regular price is $450.00, what is the percent of discount?

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

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?