How many hundredth are in seven wholes?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm