A perpetuity has payments of 1, 1, 2, 1, 1, 3, 1, 1, 4,... Payments are made at the end of each year. Assuming an annual effective interest rate of 5%, find the present value of the perpetuity.

1.5 rev/s Since angular momentum is conserved, the product of the moment of inertia and the rotational rate will remain a constant. So, assuming X as the desired rate of rotation we have: X * 2.9 = 4.8 * 0.90 Now solve for X X * 2.9 = 4.8 * 0.90 X * 2.9 = 4.32 X = 1.489655172 So when her arms and one leg go outward, her rotation slows to 1.489 rev/s. Rounding to 2 significant figures, gives 1.5 rev/s.