Hello I need help with these math problems

1.

1 point What is the radius of the circle for the polar equation 1' = 16 cos 0? Enter a numerical value only, round it to one decimal place. Type your answer... 3 1 point The graph of r2 = sin(20) is a C cardioid circle lemniscate O limaconWhat is the length of the polar curve 1' = 9 sin 0 from 0 = O to 9 = 27r? Enter a numerical value only, round your answer to one decimal place. Type your answer... 1 point 7r 7r If (r, 0) is another representation for the polar point (4.0, I) and the angular coordinate is 9 = I , what is the radial coordinate 7'? Enter a numerical value only, round it to one decimal place. Type your