Solve the equation by completing the square. x^2 + x - 12= 0 A. {-8, 3} B. {-3, 4} C. {-4, 3} D. {-8,6}

How do you find principle and simple interest

Just tell me how to set up the equation.

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics