The percent of high school students who smoked cigarettes on 1 or more of the 30 days preceding the survey is given by y=-0.064x² +0.277x + 33.715, where x is the number of years after 1990. During what years from 1990 on is the percent greater than 30%? From to the percent is greater than 30%. (Round up to the nearest year as needed.) KIXE

The percent of high school students who smoked cigarettes on 1 or more of the 30 days preceding the survey is given by y=-0.064x² +0.277x + 33.715, where x is the number of years after 1990. During what years from 1990 on is the percent greater than 30%? From to the percent is greater than 30%. (Round up to the nearest year as needed.) KIXE

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter8: Introduction To Functions

Section8.10: Inverse Variation

Problem 3ST

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