Kate likes to walk down moving escalators and she takes one step at a time. when she walks down at a rate of 2 steps per second, she reaches the bottom from top after 18 steps. when she is exhausted she will walk down at a rate of 1 step per second and she will reach bottom from top after 12 steps. find the time taken for her to reach bottom from top if she just stands on escalator?​

Who is the intended audience for the following text? modern smartphones meet the computing needs of most people. one of their biggest advantages is portability. they have replaced cameras, maps, notebooks, calculators, diaries, and calendars. people use smartphones in ways that we couldn’t have imagined before. let’s consider a few situations that show how smartphones have changed the way we live. many criticize smartphones because people seem to care more about being on their phones than socializing with real people. however, smartphones allow us to stay in closer contact with others who live far away. they also give us access to a larger number of people we can contact in case of an emergency. smartphones also contain apps for maps and global positioning systems. you can use these apps to find people and places or send your location to friends and family. smartphones are powerful, portable computer devices. they have replaced many items that performed single tasks, making our lives easier. a. people who want to know the benefits of smartphones b. people who want to know the latest advances in smartphone technology c. investors who want to understand trends in smartphone sales d. people who are expert users of smartphones