What is the length of an arc cut off by an angle of 3 radians on a circle of radius 8 inches?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Precalculus question, image attached.

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x, y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis