Which ordered pair is the best approximation of the solution

The production line where you work can assemble 5 appliers every 30 minutes at this rate how long should it take the line to assemble 125 amplifiers

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?