Johnnys parents were given a savings bond when he was born to with college. the bond received 8.9% interest, compounded quarterly. when they withdrew the money when johnny was 18 years old, they had $2. how much money was the savings bond initially worth when purchased?

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?