In 1867, the United States purchased Alaska from Russia. Alaska is about 5.9 x 105 square miles. The United States paid about $12.20 per square milo. Approximately how much did the United States pay Russia for Alaska?
Complete the steps to answer the question.
1. Write the expression:
(5.9 x 105)(12.2)
2. Multiply the decimal values:
V x 105
3. Write in scientific notation:
The United States paid Russia approximately
for Alaska.

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?