What is the completely factored form of p4 - 16?
(0-2)(0 - 2)(0 + 2)(0+2)
(0-2)(0-2)(p-2)(0-2)
(0-2) (0+2)(x² + 20+4)
(0-2) (0+2) (0²+4)

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.