Two workers work together 8 hours a day to produce a product. The time to complete one of their products is 2 minutes and 6 minutes respectively. Use the harmonic mean formula. Calculate the average time it takes to produce 1 piece by these 2 workers

Need this asap if anyone can i would be very grateful. if you could show workings that would really

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15