An auditorium has a length of 9 meters and a width of 4 meters. a platform is built in the auditorium that increases the length by m meters. how can the new area of the auditorium be expressed in simplified form?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

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