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.

A. the probability that a product is defective is 0.1. what is the probability that there will be 1 or less defective products out of the next 8 produced products b. the expected number of imperfections in the coating nylon for parachutes is 6 per 100 yards. what is the probability of finding 12 or fewer imperfections in 260 yards c. in a lot of 54 products there are 9 defective products. calculate the probability that not more than 1 is defective from a random sample of 17 products.