SAT, 15.04.2020 23:09 jshhs

Mariana and Hannah are conducting an experiment to test the difference threshold for sense of touch on the forehead. For trial 1, Hannah closes her eyes while Mariana gently touches 2 paperclip points 3 millimeters (mm) apart on Hannah's forehead. Then Hannah reports whether she could feel 1 or 2 points. For each of the next trials, Mariana and Hannah repeat this process, each time with the points 2 more (mm) apart. Hannah reports feeling 1 point until the points are 15 mm apart, when she begins reporting that she feels 2 points. Which inequality best represents the trial numbers in which Hannah feels 2 points?

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Mariana and Hannah are conducting an experiment to test the difference threshold for sense of touch...