The number of high school students who have ever use marijuana for the years 198

Question

The number of high school students who have ever use marijuana for the years 1985 through 2001 is given by y=-0.1937x^2 +4.0095x +27.5645, where X is the number of years from 1985. Use the model to estimate the years when the percent who ever used marijuana is greater than 42.1%. Percent of high school students who ever use marijuana is greater than 42.1% for the years ______ through ______. The number of high school students who have ever use marijuana for the years 1985 through 2001 is given by y=-0.1937x^2 +4.0095x +27.5645, where X is the number of years from 1985. Use the model to estimate the years when the percent who ever used marijuana is greater than 42.1%. Percent of high school students who ever use marijuana is greater than 42.1% for the years ______ through ______. Percent of high school students who ever use marijuana is greater than 42.1% for the years ______ through ______.

Explanation / Answer

The number of high school students who have ever use marijuana for the years 1985 through 2001 is given by y=-0.1937x2 +4.0095x +27.5645

where X is the number of years from 1985

from 1985 to 1989 the number of years = 5

y=-0.1937*52 +4.0095*5 +27.5645

y> 42.1%

yeras 1989 to 2001 the Percent of high school students who ever use marijuana is greater than 42.1%

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