Which of the choices sean are not true when considering virus behavior

Modern businesses use different technologies to accomplish work tasks

Mariah was working on a multimedia presentation that included both video and audio files. the file was huge, and she wanted to send it to her coworker in another office. she needed to reduce the size of the file so that it could be transmitted faster. the utility she used to do this was

Acontractor's project being analyzed by pert has an estimated time for the critical path of 120 days. the sum of all activity variances is 81; the sum of variances along the critical path is 64. the probability that the project will take 130 or more days to complete is?