The variance of a stock's returns can be calculated as the:
a. square root of the average value of deviations from the mean.
b. average value of squared deviations from the mean.
c. sum of the deviations from the mean.
d. average value of deviations from the mean.

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?