Which statement regarding polynomials and their zeros is true?
(1) f(x) = (x2 - 1)(x + a) has zeros of 1 and -a, only.
(2) f(x) = x3 – ax2 + 16x – 16a has zeros of 4 and a, only.
(3) f(x) = (x2 + 25)(x + a) has zeros of 25 and -a.
(4) f(x) = 73 - ax- 9x + 9a has zeros of +3 and a.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

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

Which function has the domain x> -11?