Students in an ecology class measured the length and surface area of red oak leaves collected on campus. The leaves were chosen based on their position on the tree: sun leaves were located on the outside edge of the tree, and shade leaves were located deep inside the canopy of the tree. A sample of 12 shade leaves had a mean length of 12.6 cm, with a standard deviation of 2.37 cm. Calculate a 95% confidence interval for the population mean for length of leaves in the shade. Which is the correct critical value of t?

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

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