The City of San Francisco has two bridges, Golden Gate Bridge and Bay Bridge. Assume these two bridges are designed to survive during earthquakes with magnitude of less than 7 Richter with the probabilities of 0.95 and 0.98. What is the probability that at least one of these two bridges collapse facing an earthquake with magnitude of over 7 Richter?

9. A ___________ life table would be most appropriate for a population of sessile barnacles, whereas a _________________ life table would be most appropriate for a population of baitfish such as herring. *

2 points

a. static; composition

b. cohort; stable

c. static; cohort

d. cohort; static

The probability that a bridge won't pass a wellness check is 0.09. What is the probability that in a sample of 12 bridges, 2 or more will not pass?

*The bridges are independent,

3. A telephone survey of university students was conducted to estimate the prevalence of respiratory disease in the student population. What type of study is this? (1 mark) a) Case-control b) Cohort c) Cross-sectional d) Longitudinal e) Cluster-randomised trial 3b. Could this study be affected by selection bias? If so, how? Answer in complete sentences. (1 mark) 3c. How would such bias affect the prevalence estimate? Answer in complete sentences. (1 mark)

Nina is looking to analyze the distribution of the variable X=’grading. She gathered information from 1900 to 2000, and her data concludes X follows a normal distribution with mean 75 and variance 30.

1. What is the probability that a typical student from the current cohort enrolled receive a grade above 80?
2. Between what values will the grades of the 95% of all students in the current cohort fall?
3. Find the value that represents the 25^th and 75^th percentile of this distribution. Then, find the interquartile range. Can a student who got 45 be considered a potential outlier, explain the reasoning.

PLEASE SHOW EACH STEP AND EXPLAIN EACH STEP AS TO WHERE YOU ARE GETTING VALUES FROM (i.e., if you got value from z table, tell me why you use that table and where exactly). use mathematical formula as well as give me a reason why you used what formula you used.

Problem 5 Santa Corporation is 90 percent owned subsidiary of Panta Corporation, acquired by Panta on January 1, 20X1 for $270,000 when Santa’s common stock and retained earnings were $100,000 and $150,000 respectively. All book values of Santa’s assets and liabilities were equal to their fair values except unrecorded patent which its fair value is equal the differential value with remaining life of 10 years. Both firms are using FIFO method of inventory. Followings are the transactions of merchandize between these two firms: ----------------------------------------------------------------------------------------------------------- Cost Sales value Ending Inventory ----------------------------------------------------------------------------------------------------------- 20X1 Santa sold to Panta $60,000 $ 80,000 $16,000 20X2 Santa sold to Panta 80,000 100,000 15,000 ------------------------------------------------------------------------------------------------------------ During 20X1 Santa sold an equipment with book value of $20,000 to Panta for $30,000. The remaining life of the equipment is 5 years. ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Separate income (not included Investment income) for 20X1 $40,000 $30,000 Dividend 0 0 Income statements for Panta and Santa Corporations for 20X2 are: ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Sales $300,000 $150,000 Income from Santa 43,200 Cost of Sales (200,000) ( 90,000) Other expenses ( 67,000) (10,000) Net Income $ 76,200 $ 50,000 Dividend 0 0 Balance Sheet item (December 31, 20X2): Investment in Santa $324,900 Required: Problem 5 Santa Corporation is 90 percent owned subsidiary of Panta Corporation, acquired by Panta on January 1, 20X1 for $270,000 when Santa’s common stock and retained earnings were $100,000 and $150,000 respectively. All book values of Santa’s assets and liabilities were equal to their fair values except unrecorded patent which its fair value is equal the differential value with remaining life of 10 years. Both firms are using FIFO method of inventory. Followings are the transactions of merchandize between these two firms: ----------------------------------------------------------------------------------------------------------- Cost Sales value Ending Inventory ----------------------------------------------------------------------------------------------------------- 20X1 Santa sold to Panta $60,000 $ 80,000 $16,000 20X2 Santa sold to Panta 80,000 100,000 15,000 ------------------------------------------------------------------------------------------------------------ During 20X1 Santa sold an equipment with book value of $20,000 to Panta for $30,000. The remaining life of the equipment is 5 years. ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Separate income (not included Investment income) for 20X1 $40,000 $30,000 Dividend 0 0 Income statements for Panta and Santa Corporations for 20X2 are: ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Sales $300,000 $150,000 Income from Santa 43,200 Cost of Sales (200,000) ( 90,000) Other expenses ( 67,000) (10,000) Net Income $ 76,200 $ 50,000 Dividend 0 0 Balance Sheet item (December 31, 20X2): Investment in Santa $324,900 Required: Problem 5 Santa Corporation is 90 percent owned subsidiary of Panta Corporation, acquired by Panta on January 1, 20X1 for $270,000 when Santa’s common stock and retained earnings were $100,000 and $150,000 respectively. All book values of Santa’s assets and liabilities were equal to their fair values except unrecorded patent which its fair value is equal the differential value with remaining life of 10 years. Both firms are using FIFO method of inventory. Followings are the transactions of merchandize between these two firms: ----------------------------------------------------------------------------------------------------------- Cost Sales value Ending Inventory ----------------------------------------------------------------------------------------------------------- 20X1 Santa sold to Panta $60,000 $ 80,000 $16,000 20X2 Santa sold to Panta 80,000 100,000 15,000 ------------------------------------------------------------------------------------------------------------ During 20X1 Santa sold an equipment with book value of $20,000 to Panta for $30,000. The remaining life of the equipment is 5 years. ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Separate income (not included Investment income) for 20X1 $40,000 $30,000 Dividend 0 0 Income statements for Panta and Santa Corporations for 20X2 are: ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Sales $300,000 $150,000 Income from Santa 43,200 Cost of Sales (200,000) ( 90,000) Other expenses ( 67,000) (10,000) Net Income $ 76,200 $ 50,000 Dividend 0 0 Balance Sheet item (December 31, 20X2): Investment in Santa $324,900 Required: Problem 5 Santa Corporation is 90 percent owned subsidiary of Panta Corporation, acquired by Panta on January 1, 20X1 for $270,000 when Santa’s common stock and retained earnings were $100,000 and $150,000 respectively. All book values of Santa’s assets and liabilities were equal to their fair values except unrecorded patent which its fair value is equal the differential value with remaining life of 10 years. Both firms are using FIFO method of inventory. Followings are the transactions of merchandize between these two firms: ----------------------------------------------------------------------------------------------------------- Cost Sales value Ending Inventory ----------------------------------------------------------------------------------------------------------- 20X1 Santa sold to Panta $60,000 $ 80,000 $16,000 20X2 Santa sold to Panta 80,000 100,000 15,000 ------------------------------------------------------------------------------------------------------------ During 20X1 Santa sold an equipment with book value of $20,000 to Panta for $30,000. The remaining life of the equipment is 5 years. ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Separate income (not included Investment income) for 20X1 $40,000 $30,000 Dividend 0 0 Income statements for Panta and Santa Corporations for 20X2 are: ----------------------------------------------------------------------------------------------------------------- Panta Santa ------------------------------------------------------------------------------------------------------------------ Sales $300,000 $150,000 Income from Santa 43,200 Cost of Sales (200,000) ( 90,000) Other expenses ( 67,000) (10,000) Net Income $ 76,200 $ 50,000 Dividend 0 0 Balance Sheet item (December 31, 20X2): Investment in Santa $324,900 Required: 13. Verify the balance of investment in Santa that appear in the 20X2 Panta’s balance sheet : $_______________. 14. How much investment in Santa is reported in the 20X2 consolidated balance sheet? $_______________. 15. How much land is reported in Santa’s book as of Dec. 31, 20x2? $______________. 16. How much land is reported in consolidated balance sheet as of Dec. 31, 20x2? $____________.

Abrams established a rule that relates the water-cement ratio to strength of concrete. List two additional factors that have a significant influnce on the concrete strength.

Q2. Explain does why: • The transtion zone impact more rich cementitious mixtures than lean ones.

• Air entrainment reduce the strength of moderate to high strength concrete yet may enhance the strength of low strength concrete.

• ASTM cements Type I. III, and V have different impact on early and later strength of concretes made with these cements.

• On the basis of qual workability the surface characteristics of aggregate have a limited impact on the ultimate strength of concrete.

• the surface characteristics of aggregate have a clear impact on ultimate strength of concrete on the basis of qual water content.

• The cylinder strength is higher than that of cube's.

• The aspect ratio of concrete cylinders has no impact on compressive strength obtained in compression testing machine with brush platens.

• Concrete bridges should not be subjected to stress levels higher than 0.55 of ultimate strengths.

• the maximum aggregate size of aggregate have two opposing effects on concrete strength.

How do network bridges scale up a local area network by reducing the collision domain? Why can’t bridges make a local area network collision free?