Witch number is a palindrome 6554 or 606

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

X+y=-4 x-y=2 use elimination with adding and subtraction

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