How Long to Travel 12m at 0.20m/s² Starting at 3.0m/s?

[mat1101]

Homework Statement

Accelerating uniformly at a rate of 0.20m/s^2 from initial velocity of 3.0m/s, how long will it take to travel a distance of 12m

Homework Equations

The Attempt at a Solution

Answer is 3.5 seconds
But I don't know how you get that

Also another question

Chris accelerrates his massive SUV from rest at a rate of 4.0m/s^2 for 10s. he then travels at a constant velocity for 12s and finally comes to rest over a displacement of 100m. Determine his total displacement and average velocity,

Answer is 780m;29m

Please help!

 

[omiver4]

well do you know the equations for kinematics problems?

I.e

x=x_0 + V_0*t + .5at^2