Describe difference between direct variation and joint variation

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.

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

If we pull out the middle player of team a and the fourth player of the team b. what will be the force of team a and team b? what is their sum of forces