A. A=10, b=20

B. a=1, b=0

C. a=5, b=5

D. None

The approximate percentage reduction in the volume of a cube of ice, if each side of the ice cube to reduced by 0.7% due to melting to:

The equation of the normal to the curve 3y^{2}=4x+1 at (1, 2) is

The angle between the curves y=x^{2} and y=4-x^{2} is

If the normal to the curve x^{3}-y^{2} =0 at (m^{2}, -m^{3}) is y=mx-2m^{3}, then the value of m^{2 }is

The curves y=x^{2}-1, y=8x-x^{2}-9 touch each other at the point (2, 3). The equation of the common normal is