Liam and his brother ran a race. Liam reached the finish line in 78.6 seconds and his brother reached the finish line 6.7 seconds later. How long did it take Liam's brother to run the race?

The function show two sisters' savings account and the rate at which they plan to deposit money

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?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319