What percentage of smartphone owners between the ages of 18-44 state they cannot recall the last time their mobile phone was not next to them?

   25%

Explanation:  Smartphones are certainly an inevitable part of the everyday life of the modern technological age. It is almost impossible to imagine a day-to-day life without the use of smartphones for a variety of purposes, from using a variety of applications through common calls, etc. The said age range of 18-44 years, which means from teens to middle-aged people, where as many as 25%, which is a quarter of this age population, do not remember when they left the phone for five minutes. Probably nothing terrible would happen in those five minutes, but that speaks to how widespread the use of smartphones is. Teens are known to use it for a variety of applications for different needs, while these phones can also serve the business of middle-aged people. This phenomenon may be a matter of prestige and perhaps a matter of need and habit, but it is a familiar cliché that these 25% do not want to leave their phones even for five minutes.

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d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer