In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before - after) in their levels of LDL cholesterol (in mg/dL) have a mean of 3.5 and a standard deviation of 17.3 . Construct a \( 99 \% \) confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol? Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the confidence interval estimate of the population mean \( \mu \) ? \( \square \mathrm{mg} / \mathrm{dL}<\mu<\square \mathrm{mg} / \mathrm{dL} \) (Round to two decimal places as needed.)

Find the zero(s), the horizontal intercept(s) and vertical intercept of the polynomial function \( f(x)=3 x^{3}+2 x^{2}-9 x-6 \) The zero(s) is/are The horizontal intercept(s) is/are The vertical intercept is

Simplify \( \frac{8}{4-9 i} \)

luye agua con un gasto de \( 12 \mathrm{~m}^{3} / \mathrm{s} \) en un canal trapezódal revestido de concreto ( \( \mathrm{n}=0.015 \) ). 0 ncho de plantilla \( b=4 \mathrm{~m} \), taludes 21 y pendiente longitudinal 00009 . Si el tirante medido en la stación de aforo es de 080 m , uticice el método estandar (directo) para encontrar la distancia a l e ubica un tirante de 100 m

Figura, ¿Cuántas diagonales internas se pueden trazar en la figura resoltante? \( \begin{array}{ll}\text { a) } 18 & \text { c) } 27 \\ \text { b) } 20 & \text { d) } 35\end{array} \)

Utilice el criteno de la sección de máxıma eficiencia para un conocer el área de un canal de sección trapezoıdal si el gasto de diseño es \( 10.0 \mathrm{~m}^{3 / \mathrm{s}} \), la pendiente geométrica del canal es 0.00052 y la n = 0.025 NOTA Indique su respuesta en metros cuadrados, con dos decimales