I'll answer the first question. The directrix is vertical so the parabola opens sideways. The equation is therefore of the form: 4p(x - h) = (y - k)^2 The directed distance from the directrix to the vertex is p. p = 6 - 1 = 5 4p = 4*5 = 20 p is positive so the parabola ...
November 29, 2008
Let P = population in millions t = time in years Population growth is continuous. For continuous compounding use the formula: P = 65*e^(.015t) For the population in 12 years we have: P = 65*e^(.015*12) = 65*e^(.18) P = 77.8 million
November 25, 2008