Ojos del Salado is the highest mountain in Chile, with a peak at about 6,900 meters above sea level. The Atacama Trench, just off the coast of Peru and Chile, is about 8,100 meters below sea level (at its lowest point). a) What is the difference in elevations between Mount Ojos del Salado and the Atacama
Trench? Show or explain how you arrived at your answer.
b) Is the elevation halfway between the peak of Mount Ojos del Salado and the Atacama
Trench above sea level or below sea level? Explain without calculating the exact value.
c) What elevation is halfway between the peak of Mount Ojos del Salado and the Atacama
Trench? Show or explain how you arrived at your answer.

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.

Why is x= 4 a solution to the proportion 14/x 56/1 6

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?