A phone company charges for service according to the formula: C(n) = 27 + 0.03n, where n is the number of min talked, and C(n) is the monthly charge, in dollars. The rate of change in this equation is:

The initial value in this equation is: ​

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.