22. Elbert is graduating from college in eighteen months, but he will need a loan in the amount of $4,250 for his last three semesters. He may either receive an unsubsidized Stafford Loan with
an interest rate of 6.8%, compounded monthly, or his parents may get a PLUS Loan with an
interest rate of 7.8°, compounded monthly. The Stafford Loan has a grace period of six
months from the time of graduation. Which loan will have a higher balance and by how much
at the time of repayment?

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

What is always true about a positive integer raised to a negative odd power?

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?