Can someone help me with this?

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 values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.