Please help I never understood this a lot, Determine the missing statement and reason in the following proof.
Given: Prove:

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia