What is the interquartile range of the following data set? 30, 26, 28, 32, 28, 30 A. 6

B. 0

C. 4

D. 2

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

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.