25 ! find first differences for the sequence in order from a1 to a5. determine whether or not the series is quadratic or not. -1, -3, -1, 5, 15 a) 2, 2, 6, 10; not quadratic b) 2, 2, 6, 10; quadratic c) -2, 2, 6, 10; not quadratic d) -2, 2, 6, 10; quadratic

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

The table shown below gives the approximate enrollment at the university of michigan every fifty years. how many more students were enrolled at the university of michigan in 1950 than in 1900?