Use the history function to retrieve the command line you used in exercise 19. use the edit function to remove the word "clear" and replace it with "date." next, go to the beginning of "cal" and delete the text on the line from "cal" to the end. now, change the -h to -u. finally, add "; date -u" so that your final command-line entry is: who -u ; date -u. execute the command-line entries.

For which utilities, if any, does the landlord pay?

John recently worked on a project about various programming languages. he learned that though procedural language programs are useful, they have disadvantages too. what is a disadvantage of programs written in procedural languages? a. programs do not represent data complexity. b. programs take more time to execute. c. programs are prone to security threats. d. programs do not interface with multiple platforms.

Two students are discussing the flow of electricity. student a says that voltage is a measure of the amount of electron flow in a circuit. student b says that power is the product of voltage and current. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct