a. Find the equation of the tangent line to the parabola given by x^2 = 2y at point (3, 9/2)
b. In 1957, the Soviet Union launched the first artificial satellite Sputnik I. Its orbit was elliptic with the center of the earth at one focus.
find the following information:
(1) The lengths of the major and minor axes of the orbits;
(2) The apogee and perigee points from Earth.
Use the unit of kilometers for all distances.
Make sure to reference the source (the URL) if found on the internet
