SOLUTION: The function W(x)=-0.02x^2+0.26x+7.5can be used to estimate the number of workers in a certain industry in the United States, in millions, x years after 1990. For what years were t
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Question 1152723: The function W(x)=-0.02x^2+0.26x+7.5can be used to estimate the number of workers in a certain industry in the United States, in millions, x years after 1990. For what years were there (or will there be) 8.3 million workers in this industry? Answer by ikleyn(52778) (Show Source):
To answer the question, you need to solve this quadratic equation
-0.02x^2 + 0.26x + 7.5 = 8.3,
where left side is your given function and the right side is your given value.
Write it in the standard form and solve using the quadratic formula.
