If a piece of string has been chopped up into n small pieces and the length of the ith piece is Δxi. Use sigma notation to express the total length of the string.

Answers; a) 135 degree’s b) 30 degree’s c) 180 or 0 degree’s d) 90 degree’s

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min