Mya sold ipods on her web site. She bought the iPods for $80 each and included a 45% markup to get the selling price. What was the selling price for one iPod?

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 the distance between the points (2 -3) and (-6 4) on the coordinate plane

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have