Seventy-two is what percent of 45?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

How can you find the mean absolute deviation (mad) for this set of data?

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges