Please can someone help me with this? its physics and i am terrible at this lesson!
Will award Brainiest if correct

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

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.