“Find the missing side lengths, leave your answer as radicals in the simplest form” please show work

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.

Write the pair of fractions as a pair of fractions with a common denominator

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?