5.- Tres familias, A, B, y C, van a ir de vacaciones a una ciudad en la que hay tres hoteles, \( \mathrm{H}_{1}, \mathrm{H}_{2} \) y \( \mathrm{H}_{3} \) La familia A necesita 2 habitaciones dobles y una sencilla, la familia B necesita 3 habitaciones dobles y una sencilla, y la familia C necesita 1 habitación doble y dos sencillas. En el hotel \( \mathrm{H}_{1} \), el precio de la habitación doble es de 84 euros / día, y el de la habitación sencilla es de 45 euros / dia. En \( \mathrm{H}_{2} \), la habitación doble cuesta 86 euros / dia, y la sencilla cuesta 43 euros / dia.

Use the given information to find the number of degrees of freedom, the critical values \( \chi_{L}^{2} \) and \( \chi_{R}^{2} \), and the confidence interval estimate of \( \sigma \). It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. White Blood Counts of Women \( 99 \% \) confidence; \( n=149, s=1.97(1000 \) cells \( / \mu \mathrm{L}) \). \( \mathrm{df}=148 \) (Type a whole number.) \( \chi_{\mathrm{L}}^{2}=\square \) (Round to two decimal places as needed.)

6. The ASTM specifications for cement can be prescriptive, performance, or prescriptive and performance-based. isfare a performance-based specification(s) for cement. - ASTM C150 - ASTM C595 - All of the above

I6 Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. The results in the screen display are based on a \( 95 \% \) confidence level. Write a statement that correctly interprets the confidence interval. Choose the correct answer below. A. The limits of 13.05 Mbps and 22.15 Mbps contain the true value of the mean of the population of all data speeds at the airports. B. We have \( 95 \% \) confidence that the limits of 13.05 Mbps and 22.15 Mbps contain the sample mean of the data speeds at the airports. C. The limits of 13.05 Mbps and 22.15 Mbps contain \( 95 \% \) of all of the data speeds at the airports. D. We have \( 95 \% \) confidence that the limits of 13.05 Mbps and 22.15 Mbps contain the true value of the mean of the population of all data speeds at the airports.

\( M=-8 r^{2}+11 r-6 \) \( T=-7 r^{2}-9 r+14 \) \( \begin{array}{l}M+T=\square \\ \text { Your answer should be a polynomial in standard form. }\end{array} \)

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