Use the given information to find the number of degrees of freedom, the critical values \( \chi_{\mathrm{L}}^{2} \) and \( \chi_{\mathrm{R}}^{2} \), and the confidence interval estimate of \( \sigma \). It is reasonable to assum that a simple random sample has been selected from a population with a normal distribution. White Blood Counts of Women \( 99 \% \) confidence; \( \mathrm{n}=148, \mathrm{~s}=1.97 \) ( \( 1000 \mathrm{cells} / \mu \mathrm{L}) \). \( \mathrm{df}=\square \) (Type a whole number.)

Simplify the expression and write the answer with positive exponents \( \frac{\left(3 g^{4} c^{-2}\right)^{2}}{\left(4 g^{-4} c^{2}\right)^{5}} \)

Simplify the expression and write the answer with positive exponents only. \( \left(6 y^{4} b^{-7}\right)\left(3 y^{-5} b^{8}\right) \)

Solve the inequality (algebraically). \( \frac{(x-9)(x+9)}{x}<0 \) A. \( (-\infty,-9) \cup(9, \infty) \) B. \( [-9,0) \cup[9, \infty) \) C. \( [-9,0) \cup(0,9] \) D. \( (-\infty,-9) \cup(0,9) \)

Simplify the expressions. Enter your answers in exponential form. a. \( \left((\sqrt{2} z)^{6}\right)^{8}=2^{24} z^{48} \) b. \( \left(\left(\frac{3 z}{x}\right)^{5}\right)^{10}=\frac{3^{50} z^{50}}{x^{50}} \) c. \( \left(\left(\frac{s}{t}\right)^{9}\right)^{11}=\frac{s^{99}}{t^{99}} \)

Question 8 Solve the following quadratic inequality: \( 2 x^{2}+1 x-1 \geq 0 \) Write your answer in interval notation. Enter DNE if there is no solution. Question Help: Video Submit Question