Natalie and carol each made a bowl of punch. Carol used 3 1/2 times as much lemonade as Natalie did. If Natalie used 1 1/5 cups o lemonade ,how many cups of lemonade did carol use ?

This is so hard and it’s for a test

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?

Find the distance between the point (-3,-4), and (see the picture below)