Your assignment in history class is to write a short paper on U. S. Presidents. Your teacher gives you a list of 5 presidents
and wants you to do a paper on 2 of them. How many
different pairings are possible?

... pls help

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Asap the total attendance for all of a baseball league in 2012 was about 7.5×107 fans, while the attendance for the tornadoes in 2012 was about 1.5×106 fans. about how many times more was the attendance for the entire baseball league than the attendance for just the tornadoes? 50 times more 10 times more 2 times more 5 times more

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?