In trapezoid abcd, the parallel sides ab and cd have lengths of 8 and 20 units, respectively, and the altitude is 12 units. points e and f are the midpoints of sides ad and bc, respectively. what is the area of quadrilateral efcd in square units?

The federal reserve controls certain interest rates in the united states. investors often try to speculate as to whether the federal reserve will raise or lower rates and by how much. suppose a company conducts extensive interviews with financial analysts, and as a result, predicts that "thefed" will increase rates by an average of 0.25 percentage points every six months for the forseeable future. which type of equation could be used to model the predicted interest rates over the next several years, assuming no other significant changes? a) a linear equation b) a quadratic equation c) a polynomial equation d) an exponential equation