How do I find speed at a given point in time given the acceleration

Question

I have the acceleration and the time elapsed. Say the acceleration is 5m/s^2. I need to find the speed at second 3. How would I go about doing that?

Answer 1

$acceleration(t)=\frac{\delta V(t)}{\delta t}$

$\implies V(t)=\int aceleration(s) ds= \int \frac{5m}{s^2} ds = \frac{-5m}{s}+C$

With C an initial condition?