Which describes a cost that fluncuates depending on the number of units produced

What other information do you need to prove triangle dac=bca by asa

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Aline that intersects one of two parallel lines intersects the other also always sometimes never