the brushes in the motors that control the conveyor belts at delectable delights need to be replaced periodically. since there are many conveyor belts through the buildings, a supply of brushes is always kept on hand. the brushes come in shipments of 1000 from a supplier who claims that no more than 2% will be defective. out of each shipment, a random sample of 15 brushes is selected for testing. if there are more than 1 defective brushes in the sample, the shipment will be rejected. assume that all 15 brushes will be tested.

Spider crabs live in the shallow regions of the ocean floor. algae tend to grow on the surface of spider crabs. the algae provide the crabs protection from predators by camouflaging them. the spider crabs give the algae shelter. what does this description suggest? 1. the algae are parasites of the spider crabs. 2. the algae and the spider crabs have a mutualistic relationship. 3. the spider crabs are commensals, and the algae are parasites. 4. the spider crabs benefit from the algae living on them. 5. the spider crabs are parasites of the algae.