Help me please I will mark as brainliest

Acircle has a circumference of 7.850 units. what is its radius?

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?