A survey of 30 adults found that the mean age of a person’s primary vehicle is 5.6 years. Assume the standard deviation is 0.85 year. If the mean age of all primary vehicles is between 5.2 years and 6.0 years, approximately which confidence level does the range represent? a. 99%
b. 98%
c. 95%
d. 90%

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)