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The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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?

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.