Aproduce distributor uses 800 packing crates a month, which it purchases at a cost of $10 each. the manager has assigned an annual carrying cost of 35 percent of the purchase price per crate. ordering costs are $28. currently the manager orders once a month.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.