Updated: Monday February 19: 11:09AM, 2007 Today: Thursday January 17: 00:42AM, 2019

1.4-18: integral of 1/(1+y^2) is arctan(y)+C.

1.4-22: (1) Correct algebra gets y'/y = (4x^3-1)

1.4-22: (2) Use the initial condition to get C=-3.

1.4-26: (1) Integration of polynomials expected.

1.4-26: (2) Integral of 1/y^2 is -1/y+C.

2.3-10: (1) Solve for t if y=0.

2.3-10: (2) Determine altitude when parachute is opened.

2.3-20: (1) Solve for the height.