Explain the purpose of the open() and close() operations.

Jessie has received a contract to build a real-time application for a baker. however, the baker doesn't want to invest too much money. his only requirement is that he wants the customers to know which cupcakes are available at what time and in what quantity. so his core requirement is that the details of product should be in real time. what platform can jessie use to develop this application?

Type the correct answer in the box. spell all words correctly. under which key category do the page up and page down keys fall? page up and page down keys fall under the keys category.

During physical science class ben and jerry connected three identical lightbulbs in parallel to a battery where happens when ben removes one of the lightbulbs from it’s socket