Let f be a function that is differentiable on the open interval (1,10) . If f(2)=-5, f(5)=5, and f(9)=-5, which of the following must be true? I. f has at least 2 zeros.

II. The graph of f has at least one horizontal tangent.

III. For some c, 2

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What is the solution to the equation 9^(x+1) =27

In a sample of 200 residents of georgetown county, 120 reported they believed the county real estate taxes were too high. develop a 95 percent confidence interval for the proportion of residents who believe the tax rate is too high. (round your answers to 3 decimal places.) confidence interval for the proportion of residents is up to . would it be reasonable to conclude that the majority of the taxpayers feel that the taxes are too high?