# calculus

posted by
**Preet**
.

A rocket fired at 275 m/s at 36o angle of elevation is described by:

x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2

Find the velocity (magnitude and direction) at t = 8 s.

Round to 1 decimal place.