Explain the difference between undecidable problems and unreasonable time algorithms.

Facial expressions and gestures are examples of messages.

Jenny needs to record the names of 30 students, write down the subjects they studied, and note their grades in each subject after the midsemester exams and the end-of-semester exams. she divides the midsemester and end-of-semester information into two separate worksheets, sheet 1 and sheet 2. how will she rename the two worksheets?

Which key should you press to leave the cell as it originally was? a. delete b. cancel c. backspace d. enter