Can someone help me with this problem? I can't figure out the answer :(

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 following as a base and exponent

Simplify the expression 10/11(22z) + (a+5) -1