1. The displacement of a particle thrown upwards is given by f(t)=20-5t+2t². calculate how far it travels by the time the velocity becomes zero
2. evaluate fog if f(x)=2x^2+5 and g(x)=cos(x+h)
3. Find the volume generated when the function y=5cos2x, x-axis and the ordinates x=0 and x=π/4 rotates
4. Evaluate the integral of
7. What is time(t) in seconds taken for a stone thrown into the air to attained its maximum height(h) if h=-5t^2 + 10t +4
