\fThe equation for free fall at the surface of some planet (5 in meters, t in seconds) is s = 3.55t2. How long does it take a rock falling from rest to reach a velocity of 28.5 m/s on this planet? It takes sec for a rock falling from rest to reach a velocity of 28.5 m / 5. (Round to the nearest tenth as needed.) \fFind the derivative of the function. (Type an exact answer in terms of e.) \fFind all points (x,y) on the graph of f(x) = 2x- - 5x with tangent lines parallel to the line y = 7x + 2. . . . The point(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.)