9. Which of the following is the interquartile range of the data set shown below? (1) 5.5
(2) 7
(3) 10.5
(4) 21

19, 22, 25, 28, 28, 32, 32, 32, 34, 40

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Combine like terms to make a simpler expression 3z+z