Which of the following numbers are imaginary? I. i^2
II. square root of -1
III. 2i
(1) I, II, and III
(2) III only
(3) I and III only
(4) II and III only

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2

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

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is