What is the length of ab in the accompanying figure ?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.