The displacement jc (/) of a certain oscillator can be modeled by the DEdrx dx - y + 6 + 9x = 0. dt2 dt Find the solution jc(f) for the initial values j c ( 0 ) = 0 , j c ' (0) = 1. Sketch the graph of the solution. How many times will the oscillator go through the equilibrium state x = 0 in this case?

Introductory Statistics Unit One: Descriptive Statistics Descriptive Statistics – tabulate, organize or summarize information about an entire population. Example – A reputable breeder says the average weight of a litter of puppies is 4 pounds. Since the breeder is summarizing information about an entire population, it is a descriptive statistic. Inferential Statistics – draw and measure the reliability of conclusions about a population based on a representative sample of the population. Example – The breeder states the average size of an adult female is between 26 and 32 pounds. Obviously the breeder did not take measurements of the entire population. Instea