Hi

Can anyone help me solve the quadratic equation for the following:-

The motion of a two stage rocket is stated by it height y in metres above the ground since t seconds since launch.

Flies vertically Ist stage burns for 5 seconds and cuts out. 2nd stage rocket is under gravity alone.

modelled by the equations

Stage 1 height y = 10t2

time 0< t <5

stage 2 height y = - 5t2 + 150t - 375

time t >5

I need this to program my Ti -83 but am lost ...

Thanks :-)