use the numbers 8,5, and 2 and one operation to write an expression that includes an exponent and has a value of 8. Use each number once pl help

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.

Through non-collinear points there is exactly one plane.

Find the distance between (7,-6) and (-3,-9)