Ihave 7 different calculus textbooks and 4 different number theory text books. in how many ways can i place the 11 text books on a bookshelf, in a row, if there must be a number theory text book in the middle, and there must be a calculus textbook at each end.

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