Hannah says that 2.11 is a rational number. Gus says that 2.11 is a repeating decimal. Who is correct and why? 15 POINTS!

Can someone me out here and the tell me the greatest common factor

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

What is perpendicular to y=-1/2x+11