(Requires results from Exercise 7.) According to a letter published in the Ann Landers column in the Boston Globe on Friday, December 10, 1999, When Elvis Presley died in 1977, there were 48 professional Elvis impersonators. In 1996, there were 7,328. If this rate of growth continues, by the year 2012, one person in every four will be an Elvis impersonator. a. What was the growth factor in the number of Elvis impersonators for the 19 years between 1977 and 1996? b. What would be the annual growth factor in the number of Elvis impersonators between 1977 and 1996? c. Construct an exponential function that describes the growth in the number of Elvis impersonators since 1977. d. Use your function to estimate the number of Elvis impersonators in 2012. e. Use your model for the U.S. population from Exercise 7 to determine if in 2012 one person out of every four will be an Elvis impersonator. Explain your reasoning.

Lecture 11: February 16, 2016 Resilience The ability to maintain normal services and lives after a major event. If disruption occurs, rapid recovery with minimal social disruption. Final state of affairs are better or as good as before the event. Identify vulnerable facilities/systems. Earthquake Early Warning depends on info from the p-Wave. Seismic waves travel _______ in liquids than in solids. o S-waves don’t travel through liquid. Refraction happens when a seismic wave bends as it travels from one kind of material to the other. The division between the liquid outer core and the solid inner core is determined by: o The geotherm and the melting temperature of the core material.