Answer:
1. Customers demand thousands of products, and every grocery tries to please. - independent clause
2. Because people have different tastes, stores order many brands. - subordinate clause
3. When a product is popular, a store stocks many sizes of that one product. - subordinate clause
4. In the past, a cashier could not record every product sold as she rang up a sale. - subordinate clause
5. While the store was closed, workers took inventory. - subordinate clause
6. Managers noted products low in stock, and the purchasing agent reordered. - independent clause
7. If stock ran out too soon, customers complained. - subordinate clause
8. In 1948, when a graduate student at Drexel Institute of Technology heard about the problem, he and a partner set out to solve it. - subordinate clause
9. Almost 25 years passed before their solution became practical. - subordinate clause
Step-by-step explanation:
I underlined coordinating conjunctions and independent/subordinate clauses and bolded subordinating conjunctions.
Independent clauses are clauses that can stand on their own as separate sentences. They contain all elements a sentence should contain: a subject, predicate, and they express a complete thought. When a sentence consists of more than one independent clause, they are often connected by a coordinating conjunction. There are seven coordinating conjunctions: for, and, nor, but, or, yet, and so.
A subordinate clause is a clause that can't stand alone as a complete sentence. Its purpose is to provide additional information about the main clause. What connects subordinate clauses to main clauses are subordinating conjunctions.