Find the specified sum for each arithmetic series. 1. 2+5+ 8 +..; S7
2. (-15) + (-10) + (5) +...;S6
3. a1 =9, d=4 ; S5
4. a=32, d= -3 ; S6
5. 4+11 + 18+...; S10

(with solutions)

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

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 average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?