What is the best definition for “sample” as used in statistics? * Mark only one answer //
A. the entire population of the group
B. a part of the population that represents the entire population
C. a measure of how much the values within a population vary

Need solving this second acceleration problem.

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

Precalculus question, image attached.