Find the critical value z Subscript c necessary to form a confidence interval at the level of confidence shown below. C=0.86

Give all possible names for each angle shown.calculation tip: in angle abc, b is the vertex.

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles