Write a two column proof where that m

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.

What is a rational number between 9.5 and 9.7

What are the sotions to the quadratic equation 9x^2=4