A particle moves along the x-axis so that its position in meters after t seconds is given by the function s(t)=1/3t^3+5/2t^2 Find:

a) The velocity and acceleration functions.

b) The velocity when t=4

c) the acceleration when t=3

d) the position of the particle when the velocity is 66m/s

e) the velocity of the particle when the acceleration is 13m/s^2

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?