1. The fish population in a lake can be modelled by the function p(t) = 2(t² + 10)(t + 2), where t is the time in years from now. Determine the rate of change of the fish population in 2 years.

2. Determine the slope of the tangent to the curve y = x^2/x^2-2 and the points (2,4)

3. If the slope of the tangent to the curve y = 3x² + kx, where kEr at x = 2 is 8 , determine the value of k.