Doorknob larger radius than shaft, why?

Determine the maximum r-value of the polar equation r =3+3 cos 0

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

What is the temperature in degrees celsius of a substance with a tempature of 49k