What is the area of this circle? Hint: Use the formula A = pi x r x r. *
A. 31.4 square cm
B. 25 square cm
C. 78.5 square cm
D. 10 square cm

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