    Sentence. 1:. The ‘number:: of extremely. dbese  Américan ‘adults - those who are -at:least 100:  pounds. ovérwéiglit ~ ‘has’ quadrupled: sincé the  1980s.to about’4 million.    Senténce 2: -The...imber’ .of,.. Americans  considéred ‘extremely “obese. , or at Igast 100  pounds overweight, ‘has quadrupled’ since the  1980s to a-startling 4 million; the research  shows ..