Convert the fraction to a decimal • 4/5 •7/20 •1/25 •9/30 • 18/24 •5/8 •2/3 •1/9 •8/14

With #! i’ve tried to figure it out but i can’t.

In the 30-60-90 triangle below side s has a length of and side r has a length

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?