Preston is conducting market research on the cost of a private helicopter tour. Preston has determined that the average cost of a private helicopter tour is \( \$ 660 \), and that the distribution of costs is normally distributed with a standard deviation of \( \$ 92 \). a. Find the probability that a single randomly selected consumer spends less than \( \$ 720 \) on a private helicopter tour. b. The cost of the middle \( 50 \% \) of private helicopter tours falls between (round to the nearest dollar): c. The most expensive \( 16 \% \) of private helicopter tours cost at least how much? (round to the nearest dollar)

a) \( \frac{3}{4}+\frac{7}{6}+\frac{9}{12} \frac{3+1}{4+1} \) b) \( \frac{7}{5}-\frac{2}{9} \frac{7-2}{5-9}=\frac{5}{4} \) c) \( \frac{2}{3}+\frac{5}{7}+\frac{3}{2} \frac{2+5}{3+7} \) D) \( \frac{3}{8}+\frac{5}{24}+\frac{1}{6}+ \)

4. \( V(2 ; 3), W(-3 ; 4) \) and \( Z(1 ;-4) \) are the vertices of \( \triangle V W Z \) and \( V^{\prime}(12 ; 18) \), \( \quad \) 6. If \( \Delta V^{\prime} \) if \( \Delta V^{\prime} \) \( W^{\prime}(-18 ; 24) \) and \( Z^{\prime}(6 ;-24) \) are the vertices of \( \triangle V^{\prime} W^{\prime} Z^{\prime} \). a) State the factor of enlargement. b) Complete the following statements: i) perimeter \( \triangle V W Z: \) perimeter \( \triangle V^{\prime} W^{\prime} Z^{\prime}=\square: \square \) ii) area \( \triangle V W Z: \) area \( \triangle V^{\prime} W^{\prime} Z^{\prime}=\square: \square \).

(1). Which of the following statements is/are correct regarding the 2008 Elections of Bhutan? I. India helped Bhutan in elections by sending officials from Election Commission of India. II. Monks and nuns were not allowed to vote. III. Wearing National Dress on Election day was compulsory. (a) All are Correct (b) II and III only (c) I and III only (d) I and II only

ach year, a group surveys 50,000 households to study internet usage. In one area of the study, the group is interested in nding out how many hours a day the household spends streaming video from the internet. Describe the five basic steps in statistical study with an example of their application below. D. Use the sample statistics to infer the population parameters. In this case, the group estimates how many households have internet access. A. Act on the results. In this case, we determine that we need to have more households stream internet video. B. Repeat your study. In this case, we find a new sample to discover their internet usage. C. Draw conclusions to determine what you learned and whether you achieved your goal. In this case, we discovered the average time per day that a household spends streaming internet video. D. Draw conclusions to determine what you learned and whether you achieved your goal. In this case, we learned that some households use the internet to check email.

¿Cuánto calor absorben 600 g de aluminio cuando se eleva la temperatura de 20 a \( 100^{\circ} \mathrm{C} \) (c \( =900 \) \( \left.\mathrm{~J} /\left(\mathrm{kg} \cdot{ }^{\circ} \mathrm{C}\right)\right)^{\text {. }} \)