What is the best approximation for the area of this circle?

Use 3.14 to approximate pi.

18.8 ft²

37.7 ft²

75.4 ft²

113.0 ft²

Which of the following expressions is equal to 2x^2+8

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?

How do i simply this radical expression?