In which group of organisms do the cell walls form two thin overlapping shells that fit together?

The product of the lengths of perpendiculars drawn from any point on the hyperbola $x^2 - 2y^2 - 2 = 0$ to its asymptotes is

$A$ fan of moment of inertia $0.6 \, kg \cdot m^2$ is turned up to a working speed of $0.5$ revolutions per second. The angular momentum of the fan is:

The rate of formation of new organic matter by a rabbit in a grassland is called:

Which of the following is the correct group for the three-domain system of classification proposed by Carl Woese?

An integrating factor of the equation $(1+y+x^2 y) dx+(x+x^3) dy=0$ is