Write a proof of the following: Any two nonvertical parallel lines have queal slopes. Given: Nonvertical lines l1 and l2, l1 || l2, EF and BC are perpendicular to the x -axis Prove: BC/AC = EF/DF

Abc manufacturing has a policy that it will reject a shipment of parts from its supplier if inspectors find any defective parts in a random sample of 6 parts from the shipment. the supplier has been in business many years and has a long-term defective rate for parts of 6.2% what is the probability that a shipment will be rejected after a given sample of parts is checked?