MATLAB: Can someone help me with ODE45 function

Question

I have the differential equation in the attached pdf. I would like to change into state variable form so I can use ODE45 to numrically integerate it, but I don't know how to do it. I hope someone can help me.

Answer 1

I read it diferently:

f = @(t,v) (489.369-0.001464*v^2)/(-1.44*t+10) - 9.81