According to the survey, the average amount of time spent studying for a math test was 35 minutes, with a standard deviation of 10 minutes. What range would you expect 95% of the sample’s study times to be between if the sample was approximately normal?

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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?